Tahsili (SAAT) — Saudi Achievement Test — Questions and Answers

Question 1: What is the meaning of the prefix 'anti-' in 'antibacterial'?

In favor of
Against or opposing (Correct answer)
After
Before

Correct answer: Against or opposing

The prefix 'anti-' means against or opposing. 'Antibacterial' means against bacteria. Other examples: antibiotic (against life/bacteria), antivirus, antisocial, anticlockwise. Understanding prefixes helps decode unfamiliar vocabulary.

Question 2: What is the Hajj and where does it take place?

A trade fair in Dammam
A sporting event in Jeddah
A cultural festival in Riyadh
The annual Islamic pilgrimage to Makkah, one of the Five Pillars of Islam (Correct answer)

Correct answer: The annual Islamic pilgrimage to Makkah, one of the Five Pillars of Islam

Hajj is the annual Islamic pilgrimage to Makkah that every able Muslim must perform at least once. It takes place during Dhul Hijjah (12th month of Islamic calendar) and involves rituals at the Kaaba, Mina, Arafat, and Muzdalifah.

Question 3: في مثلث أضلاعه 5 و12 و13. ما نوعه؟

مثلث حاد
مثلث قائم (Correct answer)
مثلث متساوي الأضلاع
مثلث منفرج

Correct answer: مثلث قائم

تحقق: 5²+12² = 25+144 = 169 = 13². الشرط (أ²+ب²=جـ²) محقق، إذن مثلث قائم.

Question 4: ما مساحة الدائرة إذا كان قطرها 10 سم؟

50π سم²
25π سم² (Correct answer)
100π سم²
10π سم²

Correct answer: 25π سم²

النصف قطر = 5 سم. المساحة = πr² = π×5² = 25π سم².

Question 5: A 5 kg object is lifted 10 meters vertically. How much work is done against gravity? (g = 10 m/s²)

5000 J
50 J
100 J
500 J (Correct answer)

Correct answer: 500 J

Work = Force × Distance = mgh = 5 × 10 × 10 = 500 Joules. The force applied equals the weight (mg) and the displacement is the height lifted.

Question 6: ما معامل الارتباط بيرسون وما يدل عليه؟

يقيس قوة واتجاه العلاقة الخطية بين متغيرين، تراوح بين -1 و+1 (Correct answer)
يقيس السببية المباشرة
يقيس الانحراف فقط
قيمته دائماً موجبة

Correct answer: يقيس قوة واتجاه العلاقة الخطية بين متغيرين، تراوح بين -1 و+1

r = +1 ارتباط طردي كامل، r = -1 عكسي كامل، r = 0 لا ارتباط خطي. لا يعني بالضرورة سببية.

Question 7: ما قانون الجيب لحل المثلثات؟

sin(A+B) = sinA×cosB + cosA×sinB
a/sin(A) = b/sin(B) = c/sin(C) (Correct answer)
tan(A) = sin(A)/cos(A)
a² = b² + c² - 2bc×cos(A)

Correct answer: a/sin(A) = b/sin(B) = c/sin(C)

قانون الجيب: نسبة كل ضلع لجيب الزاوية المقابلة ثابتة في المثلث. يُستخدم عند معرفة زاوية وضلعها المقابل.

Question 8: ما الغرض الشعري الغالب في شعر أبي تمام؟

الهجاء
الرثاء
المديح (Correct answer)
الغزل

Correct answer: المديح

اشتُهر أبو تمام بشعر المدح ومن أبرز قصائده "فتح عمورية".

Question 9: What is the molarity of a solution containing 4 moles of NaCl in 2 liters of solution?

8 M
2 M (Correct answer)
0.5 M
4 M

Correct answer: 2 M

Molarity (M) = moles of solute / liters of solution = 4 mol / 2 L = 2 M. Molarity is the most commonly used concentration unit in chemistry.

Question 10: ما الزاوية التي تقيسها sin⁻¹(0.5)؟

30° (Correct answer)
90°
60°
45°

Correct answer: 30°

sin(30°) = 0.5، إذن sin⁻¹(0.5) = 30°.

Question 11: Choose the correct phrasal verb: 'The meeting was _____ until next week.'

put on
put down
put up
put off (Correct answer)

Correct answer: put off

'Put off' means to postpone or delay. 'The meeting was put off' means it was postponed. Other meanings: 'put on' (wear/stage), 'put up' (accommodate/erect), 'put down' (criticize/write). Phrasal verbs are frequently tested in Tahsili English.

Question 12: ما مساحة السطح الجانبي لأسطوانة نصف قطرها 3 وارتفاعها 5؟

9π
45π
15π
30π (Correct answer)

Correct answer: 30π

مساحة السطح الجانبي = 2πrh = 2π×3×5 = 30π.

Question 13: Complete the sentence: 'Not only _____ intelligent, but she is also hardworking.'

she was
is she (Correct answer)
she is
was she

Correct answer: is she

'Not only' at the beginning of a clause triggers subject-verb inversion: 'Not only is she intelligent...' This is a common inversion pattern in formal English, also seen with 'Never have I,' 'Rarely does he,' etc.

Question 14: What does 'ubiquitous' mean?

Very expensive
Extremely rare
Extremely old
Found everywhere; present in all places (Correct answer)

Correct answer: Found everywhere; present in all places

'Ubiquitous' means present, appearing, or found everywhere. Example: 'Smartphones have become ubiquitous in modern society.' It comes from the Latin 'ubique' meaning 'everywhere.'

Question 15: ما مساحة القطاع الدائري بنصف قطر 6 وزاوية مركزية 60°؟

3π
36π
6π (Correct answer)
12π

Correct answer: 6π

مساحة القطاع = (θ/360°)×πr² = (60/360)×π×36 = (1/6)×36π = 6π.

Question 16: ما الزاوية المحيطية وعلاقتها بالزاوية المركزية؟

لا علاقة
متساويتان دائماً
المحيطية ضعف المركزية
الزاوية المحيطية = نصف الزاوية المركزية المرتكزة على نفس القوس (Correct answer)

Correct answer: الزاوية المحيطية = نصف الزاوية المركزية المرتكزة على نفس القوس

نظرية الزاوية المحيطية: الزاوية المحيطية = ½ الزاوية المركزية الواقعتان على نفس القوس.

Question 17: What is the value of lim(x→0) [sin(x)/x]?

∞
1 (Correct answer)
Does not exist
0

Correct answer: 1

This is a fundamental limit in calculus. As x approaches 0, sin(x)/x approaches 1. This can be proven using the squeeze theorem or L'Hôpital's rule. This limit is essential for deriving the derivative of sin(x).

Question 18: What is the function of the lymphatic system?

Only transporting oxygen
Returning fluid to blood, filtering pathogens through lymph nodes, and housing immune cells (Correct answer)
Only digesting food
Only producing hormones

Correct answer: Returning fluid to blood, filtering pathogens through lymph nodes, and housing immune cells

The lymphatic system: returns interstitial fluid to the bloodstream (maintaining fluid balance), filters pathogens and foreign material through lymph nodes, transports dietary lipids from the intestine, and houses lymphocytes (T cells, B cells) for immune defense.

Question 19: A car accelerates uniformly from rest to 20 m/s in 5 seconds. What is its acceleration?

5 m/s²
100 m/s²
2 m/s²
4 m/s² (Correct answer)

Correct answer: 4 m/s²

Acceleration = (final velocity - initial velocity) / time = (20 - 0) / 5 = 4 m/s². The car increases its velocity by 4 meters per second every second.

Question 20: أيٌّ من الآتي مثال على أسلوب القصر بـ"إنما"؟

هل نجحتَ؟
قرأتُ الكتابَ
إنما النجاح بالجد (Correct answer)
ما أجمل السماء!

Correct answer: إنما النجاح بالجد

"إنما" من أدوات القصر التي تحصر المعنى وتقيده، فهي تُفيد أن النجاح لا يكون إلا بالجد.

Question 21: أيُّ الأساليب الآتية يُفيد التعجب؟

لا تُهمل واجباتك.
ما أجملَ الربيعَ! (Correct answer)
أيُّ طالبٍ أنتَ؟
اجتهدْ في دراستك.

Correct answer: ما أجملَ الربيعَ!

"ما أجملَ" أحد صيغتَي التعجب القياسيتين في العربية، والصيغة الثانية هي "أَفْعِل به".

Question 22: What is the largest desert in Saudi Arabia?

Ad-Dahna Desert
Sinai Desert
Rub' al Khali (Empty Quarter) (Correct answer)
An-Nafud Desert

Correct answer: Rub' al Khali (Empty Quarter)

The Rub' al Khali (Empty Quarter) is the world's largest continuous sand desert, covering about 650,000 km² in the southern Arabian Peninsula. Most of it lies within Saudi Arabia. It features sand dunes up to 250 meters high.

Question 23: According to Ohm's Law, if a circuit has a voltage of 12V and resistance of 4Ω, what is the current?

0.33 A
48 A
3 A (Correct answer)
16 A

Correct answer: 3 A

Ohm's Law: V = IR, so I = V/R = 12/4 = 3 Amperes. Ohm's Law describes the linear relationship between voltage, current, and resistance in a conductor.

Question 24: ما نظرية باقي القسمة في الجبر؟

باقي القسمة دائماً صفر
p(x) دائماً قابل للقسمة على (x-a)
النظرية لا تتعلق بالتعويض
باقي قسمة p(x) على (x-a) يساوي p(a) (Correct answer)

Correct answer: باقي قسمة p(x) على (x-a) يساوي p(a)

نظرية الباقي: p(x) ÷ (x-a) باقيه = p(a). مثال: باقي x²+2 عند القسمة على (x-1) = 1²+2=3.

Question 25: أيٌّ من الكلمات الآتية معناها "الفصاحة والبيان"؟

الإيجاز
السجع
الإطناب
البلاغة (Correct answer)

Correct answer: البلاغة

البلاغة في اللغة هي البيان والفصاحة، وهي مطابقة الكلام لمقتضى الحال.

Question 26: What does the word 'meticulous' mean?

Large and impressive
Friendly and sociable
Careless and hasty
Very careful and precise with great attention to detail (Correct answer)

Correct answer: Very careful and precise with great attention to detail

'Meticulous' means showing extreme care and great attention to detail. A meticulous student checks their work thoroughly. Synonyms: thorough, careful, precise, painstaking.

Question 27: ما المقصود بـ"الإيجاز" في علم البلاغة؟

أداء المعنى الكامل بألفاظ قليلة (Correct answer)
التكرار لغرض التأكيد
إطالة الكلام لتوضيح المعنى
التشبيه بين شيئين

Correct answer: أداء المعنى الكامل بألفاظ قليلة

الإيجاز هو التعبير عن المعنى الكامل بأقل عدد ممكن من الكلمات دون إخلال.

Question 28: What is the process of photosynthesis?

Breaking down glucose for energy
Converting proteins into carbohydrates
Converting light energy, CO₂, and H₂O into glucose and O₂ using chlorophyll (Correct answer)
Absorbing oxygen and releasing carbon dioxide

Correct answer: Converting light energy, CO₂, and H₂O into glucose and O₂ using chlorophyll

Photosynthesis: 6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂. It occurs in chloroplasts using chlorophyll to capture light energy. The light reactions produce ATP and NADPH; the Calvin cycle fixes CO₂ into glucose.

Question 29: ما معادلة الدائرة المركزها (2,3) ونصف قطرها 4؟

(x-2)² + (y-3)² = 4
(x-2)² + (y-3)² = 16 (Correct answer)
(x+2)² + (y-3)² = 8
(x+2)² + (y+3)² = 16

Correct answer: (x-2)² + (y-3)² = 16

معادلة الدائرة: (x-h)² + (y-k)² = r². مركزها (2,3) ونصف القطر 4: (x-2)² + (y-3)² = 16.

Question 30: What is Newton's Third Law of Motion?

F = ma
For every action, there is an equal and opposite reaction (Correct answer)
An object at rest stays at rest
Energy cannot be created or destroyed

Correct answer: For every action, there is an equal and opposite reaction

Newton's Third Law states that when object A exerts a force on object B, object B simultaneously exerts an equal and opposite force on object A. These action-reaction pairs act on different objects.

Question 31: What is Saudi Vision 2030?

A plan to build 2,030 new cities
A space exploration program
A comprehensive strategic framework to diversify the economy, develop public service sectors, and reduce oil dependency (Correct answer)
A military defense strategy

Correct answer: A comprehensive strategic framework to diversify the economy, develop public service sectors, and reduce oil dependency

Vision 2030 is Saudi Arabia's strategic plan announced in 2016 to transform the economy and society. Key pillars: a vibrant society, a thriving economy, and an ambitious nation. It includes economic diversification, entertainment, tourism, NEOM, and social reforms.

Question 32: What is the frequency of a wave with wavelength 2 meters traveling at 340 m/s?

680 Hz
340 Hz
170 Hz (Correct answer)
85 Hz

Correct answer: 170 Hz

Using v = fλ: f = v/λ = 340/2 = 170 Hz. This is the frequency of a sound wave with a 2-meter wavelength traveling at the speed of sound in air.

Question 33: What is the significance of the Saudi flag?

It has no particular significance
It represents the four seasons
It shows the national bird
It features the Shahada (Islamic declaration of faith) and a sword, representing Islam and justice (Correct answer)

Correct answer: It features the Shahada (Islamic declaration of faith) and a sword, representing Islam and justice

The Saudi flag features the Shahada ('There is no god but God; Muhammad is the Messenger of God') in white Arabic calligraphy on a green background, with a sword representing justice. The flag is never flown at half-mast due to the sacred inscription.

Question 34: What is the difference between an exothermic and endothermic reaction?

There is no difference
Exothermic needs a catalyst; endothermic doesn't
Exothermic releases heat to surroundings (ΔH < 0); endothermic absorbs heat from surroundings (ΔH > 0) (Correct answer)
Exothermic is slow; endothermic is fast

Correct answer: Exothermic releases heat to surroundings (ΔH < 0); endothermic absorbs heat from surroundings (ΔH > 0)

Exothermic reactions release energy as heat (products have lower energy, ΔH negative): e.g., combustion. Endothermic reactions absorb energy (products have higher energy, ΔH positive): e.g., photosynthesis, dissolving ammonium nitrate.

Question 35: What is the currency of Saudi Arabia?

Pound
Saudi Riyal (SAR) (Correct answer)
Dinar
Dirham

Correct answer: Saudi Riyal (SAR)

The Saudi Riyal (SAR) is the official currency, pegged to the US dollar at a fixed rate of 3.75 SAR per 1 USD since 1986. It is divided into 100 halalas. The Saudi Arabian Monetary Authority (now Saudi Central Bank - SAMA) manages monetary policy.

Question 36: ما نظرية طاليس في الهندسة؟

مساحة الدائرة = πr²
إذا قاطع خطان متوازيان ضلعين في مثلث فإنهما يقسمانه بنسب متساوية (Correct answer)
الزاوية المحيطية نصف المركزية
مجموع زوايا المثلث 180°

Correct answer: إذا قاطع خطان متوازيان ضلعين في مثلث فإنهما يقسمانه بنسب متساوية

نظرية طاليس: الخط المتوازي مع قاعدة المثلث يقطع ضلعيه بنسب متناسبة.

Question 37: ما المتوسط الهندسي لـ 4 و 9؟

6 (Correct answer)
6.5
7
5

Correct answer: 6

المتوسط الهندسي = √(أ×ب) = √(4×9) = √36 = 6.

Question 38: ما الأحداث المستقلة في الاحتمال؟

احتمال أحدهما صفر
حدوث A يستلزم B
A وB لا يمكن حدوثهما معاً
حدوث A لا يؤثر على احتمال B: P(A∩B) = P(A)×P(B) (Correct answer)

Correct answer: حدوث A لا يؤثر على احتمال B: P(A∩B) = P(A)×P(B)

الاستقلالية: P(A∩B) = P(A)×P(B). مثال: رمي حجر نرد مرتين - نتيجة الأولى لا تؤثر على الثانية.

Question 39: What is the electron configuration of carbon (atomic number 6)?

1s² 2s² 2p² (Correct answer)
1s² 2s¹ 2p³
1s² 2s² 2p⁴
1s² 2p⁴

Correct answer: 1s² 2s² 2p²

Carbon has 6 electrons. Filling in order: 1s² (2 electrons), 2s² (2 electrons), 2p² (2 electrons). Total: 6 electrons. This configuration explains carbon's ability to form 4 covalent bonds.

Question 40: What is the total resistance of three resistors (2Ω, 3Ω, 6Ω) connected in parallel?

11 Ω
1 Ω (Correct answer)
6 Ω
0.5 Ω

Correct answer: 1 Ω

For parallel: 1/R = 1/2 + 1/3 + 1/6 = 3/6 + 2/6 + 1/6 = 6/6 = 1. Therefore R = 1Ω. Parallel resistance is always less than the smallest individual resistor.

Question 41: ما الفرق بين الاحتمال الشرطي P(A|B) والاحتمال المشترك P(A∩B)؟

الشرطي أكبر دائماً
كلاهما نفس الشيء
المشترك يستلزم الشرطي
الشرطي: احتمال A بشرط حدوث B. المشترك: احتمال حدوث A وB معاً (Correct answer)

Correct answer: الشرطي: احتمال A بشرط حدوث B. المشترك: احتمال حدوث A وB معاً

P(A|B) = P(A∩B)/P(B). المشترك يقيس التزامن، والشرطي يقيس الاحتمال بعد معرفة B.

Question 42: ما وظيفة الصفة (النعت) في الجملة العربية؟

تعريف الفاعل
إسناد الفعل إلى الاسم
الربط بين جملتين
تخصيص المنعوت أو توضيحه (Correct answer)

Correct answer: تخصيص المنعوت أو توضيحه

النعت يتبع المنعوت ليُضيف إليه وصفاً يُخصصه أو يوضحه.

Question 43: ما مفهوم المستقيم العمودي بالمعادلات؟

ميله يساوي -1
ميله غير معرّف وله معادلة x = ثابت (Correct answer)
ميله يساوي 1
ميله صفر ومعادلته y = ثابت

Correct answer: ميله غير معرّف وله معادلة x = ثابت

المستقيم العمودي (الرأسي) له معادلة x = ثابت وميله غير معرّف. أما الأفقي فميله صفر.

Question 44: What is natural selection as described by Darwin?

Only the strongest organisms survive
Organisms with traits better suited to their environment survive and reproduce more, passing advantageous traits to offspring (Correct answer)
Evolution happens randomly without direction
All organisms choose their traits

Correct answer: Organisms with traits better suited to their environment survive and reproduce more, passing advantageous traits to offspring

Natural selection: variation exists within populations → some variations provide survival/reproductive advantages → organisms with advantageous traits reproduce more → these traits become more common over generations. This is the mechanism driving evolutionary adaptation.

Question 45: ما المراد بـ"الحال" في النحو العربي؟

الاسم الفاعل المشتق من الفعل
التوكيد اللفظي للاسم
وصف يبيّن هيئة صاحبه وقت وقوع الفعل (Correct answer)
الاسم الذي يقع بعد حرف الجر

Correct answer: وصف يبيّن هيئة صاحبه وقت وقوع الفعل

الحال اسم نكرة منصوب يُبيّن هيئة صاحبه عند وقوع الفعل، مثل: "جاء الطالبُ مسرعاً".

Question 46: Which of the following is a strong acid?

Carbonic acid (H₂CO₃)
Phosphoric acid (H₃PO₄)
Acetic acid (CH₃COOH)
Hydrochloric acid (HCl) (Correct answer)

Correct answer: Hydrochloric acid (HCl)

HCl is a strong acid — it completely dissociates in water: HCl → H⁺ + Cl⁻. The six strong acids are: HCl, HBr, HI, HNO₃, H₂SO₄, HClO₄. Acetic acid, carbonic acid, and phosphoric acid are weak acids (partially dissociate).

Question 47: ما اختبار الفرضية وما نوعاه؟

إجراء إحصائي يختبر صحة ادعاء: الفرضية الصفرية H₀ والبديلة H₁ (Correct answer)
حساب المتوسط فقط
رسم الرسوم البيانية
جمع البيانات وترتيبها

Correct answer: إجراء إحصائي يختبر صحة ادعاء: الفرضية الصفرية H₀ والبديلة H₁

H₀: الفرضية الصفرية (الوضع الافتراضي). H₁: الفرضية البديلة. الاختبار يحدد إذا كانت البيانات تدعم رفض H₀.

Question 48: What is the role of enzymes in biological reactions?

They are biological catalysts that lower activation energy, increasing reaction rates without being consumed (Correct answer)
They are the reactants in metabolic pathways
They provide energy for reactions
They store genetic information

Correct answer: They are biological catalysts that lower activation energy, increasing reaction rates without being consumed

Enzymes are biological catalysts (usually proteins) that lower the activation energy of reactions, dramatically increasing reaction rates (up to 10⁶ fold). They are highly specific (lock-and-key or induced-fit model), are not consumed, and are reusable.

Question 49: In a galvanic cell, what happens at the anode?

Reduction occurs
Ions are deposited
No reaction occurs
Oxidation occurs — the anode loses electrons (Correct answer)

Correct answer: Oxidation occurs — the anode loses electrons

At the anode, oxidation occurs (loss of electrons). Remember: AN OX, RED CAT — ANode = OXidation, REDuction = CAThode. The anode is the negative electrode in a galvanic cell. Electrons flow from anode to cathode through the external circuit.

Question 50: What is Avogadro's number and what does it represent?

1.6 × 10⁻¹⁹ — the charge of an electron
3.14 × 10²³ — the number of protons in a mole
6.022 × 10²³ — the number of particles in one mole of a substance (Correct answer)
9.8 — the acceleration due to gravity

Correct answer: 6.022 × 10²³ — the number of particles in one mole of a substance

Avogadro's number (6.022 × 10²³) is the number of atoms, molecules, or particles in one mole of any substance. It connects the atomic/molecular scale to the macroscopic scale, enabling conversion between mass and number of particles.

Question 51: What is the molecular geometry of methane (CH₄)?

Octahedral
Trigonal planar
Tetrahedral (Correct answer)
Linear

Correct answer: Tetrahedral

Methane has 4 bonding pairs around the central carbon with no lone pairs (AX₄ by VSEPR theory), giving a tetrahedral geometry with 109.5° bond angles. This is the most stable arrangement for 4 electron pairs.

Question 52: What is the molar mass of water (H₂O)?

18 g/mol (Correct answer)
20 g/mol
2 g/mol
16 g/mol

Correct answer: 18 g/mol

Molar mass of H₂O = 2(H) + 1(O) = 2(1.008) + 16.00 = 2.016 + 16.00 ≈ 18 g/mol. Molar mass is the mass of one mole of molecules, calculated by summing atomic masses of all atoms in the formula.

Question 53: What year was the Kingdom of Saudi Arabia officially unified under King Abdulaziz ibn Saud?

1932 (Correct answer)
1945
1925
1902

Correct answer: 1932

The Kingdom of Saudi Arabia was officially proclaimed on September 23, 1932, when King Abdulaziz unified the Hejaz, Najd, and their dependencies into a single state. This date is celebrated as Saudi National Day.

Question 54: ما الاحتمال التراكمي لحصول أقل من 60 إذا كان المتوسط 50 والانحراف 10؟

84.1% (Correct answer)
97.7%
50%
68.3%

Correct answer: 84.1%

z = (60-50)/10 = 1. P(z<1) = 84.1% في التوزيع الطبيعي.

Question 55: What is the probability of getting at least one head when flipping a fair coin 3 times?

1/2
1/8
3/8
7/8 (Correct answer)

Correct answer: 7/8

P(at least 1 head) = 1 - P(no heads) = 1 - P(all tails) = 1 - (1/2)³ = 1 - 1/8 = 7/8. The complement approach is easier than counting all favorable outcomes.

Question 56: What is the determinant of the matrix [[2, 3], [1, 4]]?

8
-5
11
5 (Correct answer)

Correct answer: 5

For a 2×2 matrix [[a, b], [c, d]], the determinant = ad - bc. So det = (2)(4) - (3)(1) = 8 - 3 = 5.

Question 57: ما الأرباع التي تكون فيها cos(θ) < 0؟

الربعان الثاني والثالث (Correct answer)
الربعان الأول والثاني
الربعان الثالث والرابع
الربعان الأول والثالث

Correct answer: الربعان الثاني والثالث

جيب التمام موجب في الربعين الأول والرابع (x موجب)، وسالب في الثاني والثالث (x سالب).

Question 58: Which sentence uses the correct form of 'there/their/they're'?

There going to finish the project.
They're books are on the table.
Their going to the library.
They're planning to visit their grandparents there. (Correct answer)

Correct answer: They're planning to visit their grandparents there.

'They're' = they are (contraction). 'Their' = possessive (belonging to them). 'There' = location/existence. The correct sentence uses all three properly: They are planning (they're) to visit belonging to them (their) at that place (there).

Question 59: ما المقصود بالمقامة في الأدب العربي؟

قصيدة طويلة مدحية
قصة قصيرة مسجوعة تعتمد على الذكاء اللغوي (Correct answer)
خطبة دينية
رسالة أدبية رسمية

Correct answer: قصة قصيرة مسجوعة تعتمد على الذكاء اللغوي

المقامة فن نثري يعتمد السجع والبديع، ظهر على يد بديع الزمان الهمذاني.

Question 60: ما الفرق بين الارتفاع والوسيط في المثلث؟

كلاهما نفس الشيء
الارتفاع ينصف الضلع
الوسيط دائماً عمود
الارتفاع عمود من رأس على الضلع المقابل، الوسيط يصل الرأس بمنتصف الضلع المقابل (Correct answer)

Correct answer: الارتفاع عمود من رأس على الضلع المقابل، الوسيط يصل الرأس بمنتصف الضلع المقابل

الارتفاع: عمود من رأس المثلث على الضلع المقابل. الوسيط: قطعة تصل الرأس بمنتصف الضلع المقابل.

Question 61: ما حجم الكرة بمعلومية نصف قطرها r؟

4πr²
πr³
(4/3)πr³ (Correct answer)
(2/3)πr³

Correct answer: (4/3)πr³

حجم الكرة = (4/3)πr³. أما 4πr² فمساحة سطح الكرة.

Question 62: ما مساحة المعين إذا كان قطراه 8 و6؟

48
24 (Correct answer)
36
12

Correct answer: 24

مساحة المعين = ½ × الأول × الثاني = ½ × 8 × 6 = 24.

Question 63: ما المتوسط الحسابي للأعداد: 8، 12، 15، 7، 18؟

11
10
12 (Correct answer)
14

Correct answer: 12

المجموع = 8+12+15+7+18 = 60. المتوسط = 60÷5 = 12.

Question 64: What is Le Chatelier's Principle?

All reactions are reversible
Chemical reactions always go to completion
Temperature has no effect on equilibrium
If a system at equilibrium is disturbed, it shifts to counteract the change and restore equilibrium (Correct answer)

Correct answer: If a system at equilibrium is disturbed, it shifts to counteract the change and restore equilibrium

Le Chatelier's Principle states that when a system at equilibrium is subjected to a change (concentration, temperature, pressure), the system adjusts to partially counteract the change. For example, adding reactant shifts equilibrium toward products.

Question 65: في علامات الترقيم، يُستخدم "الفاصلة المنقوطة (؛)" للدلالة على:

وقف أطول من الفاصلة وأقصر من النقطة (Correct answer)
الجملة الاعتراضية
بداية الحوار
نهاية الجملة

Correct answer: وقف أطول من الفاصلة وأقصر من النقطة

الفاصلة المنقوطة تُستخدم للفصل بين جملتين إحداهما سبب للأخرى أو ترتبطان ارتباطاً وثيقاً.

Question 66: What is the significance of September 23 in Saudi Arabia?

Saudi National Day — commemorating the unification of the Kingdom in 1932 (Correct answer)
Independence Day
The start of Ramadan
The founding of NEOM

Correct answer: Saudi National Day — commemorating the unification of the Kingdom in 1932

September 23 is Saudi National Day, celebrating the unification of the Kingdom by King Abdulaziz on September 23, 1932. It is a public holiday marked by celebrations, cultural events, and patriotic displays throughout the country.

Question 67: What is the solution set of the equation |2x - 3| = 7?

x = 5 only
x = 2 or x = -5
x = -2 only
x = 5 or x = -2 (Correct answer)

Correct answer: x = 5 or x = -2

|2x - 3| = 7 means 2x - 3 = 7 or 2x - 3 = -7. Case 1: 2x = 10, x = 5. Case 2: 2x = -4, x = -2. Both solutions are valid: |2(5)-3| = |7| = 7 ✓ and |2(-2)-3| = |-7| = 7 ✓.

Question 68: What is the structure of DNA?

A branched polysaccharide
A double helix of two antiparallel polynucleotide chains connected by hydrogen bonds between complementary base pairs (Correct answer)
A linear chain of amino acids
A single-stranded helix

Correct answer: A double helix of two antiparallel polynucleotide chains connected by hydrogen bonds between complementary base pairs

DNA is a double helix: two antiparallel sugar-phosphate backbone strands connected by hydrogen bonds between complementary bases (A-T with 2 H-bonds, C-G with 3 H-bonds). Discovered by Watson, Crick, Franklin, and Wilkins.

Question 69: What happens during the process of transcription?

A segment of DNA is used as a template to synthesize a complementary mRNA molecule (Correct answer)
DNA is replicated
Cells divide into two daughter cells
Proteins are assembled from amino acids

Correct answer: A segment of DNA is used as a template to synthesize a complementary mRNA molecule

Transcription: RNA polymerase binds to the promoter region, unwinds DNA, reads the template strand (3'→5'), and synthesizes a complementary mRNA strand (5'→3') using RNA nucleotides (A, U, G, C). This mRNA carries the genetic message to ribosomes.

Question 70: ما مساحة الشكل البيضاوي بمحورين a و b؟

π(a²+b²)
πab (Correct answer)
π(a+b)
2πab

Correct answer: πab

مساحة الشكل البيضاوي = π × a × b، حيث a وb نصفا المحورين الرئيسي والثانوي.

Question 71: ما مساحة المثلث بمعلومية قاعدته وارتفاعه؟

القاعدة × الارتفاع
القاعدة × الارتفاع × 2
القاعدة² × الارتفاع
½ × القاعدة × الارتفاع (Correct answer)

Correct answer: ½ × القاعدة × الارتفاع

مساحة المثلث = ½ × ق × ع. المثلث نصف مستطيل له نفس القاعدة والارتفاع.

Question 72: ما محيط القطاع الدائري بنصف قطر r وزاوية مركزية θ بالراديان؟

πr²θ/2
2r + rθ (Correct answer)
2πr
r + 2rθ

Correct answer: 2r + rθ

محيط القطاع = ضلعان (كل طوله r) + القوس (= rθ). المجموع = r + r + rθ = 2r + rθ.

Question 73: What type of energy does a compressed spring have?

Kinetic energy
Chemical energy
Elastic potential energy (Correct answer)
Thermal energy

Correct answer: Elastic potential energy

A compressed spring stores elastic potential energy. This energy is stored due to the deformation of the spring and can be converted to kinetic energy when released. PE = ½kx², where k is the spring constant and x is the compression.

Question 74: ما فترة الثقة 95% وماذا تعني؟

أفضل تقدير للمتوسط
نطاق تقديري نثق بأن المعامل الحقيقي يقع فيه بنسبة 95% (Correct answer)
95% من البيانات تقع فيه
الخطأ دائماً 5%

Correct answer: نطاق تقديري نثق بأن المعامل الحقيقي يقع فيه بنسبة 95%

فترة الثقة 95%: لو كررنا الإجراء 100 مرة، فإن 95 منها ستشمل القيمة الحقيقية للمعامل.

Question 75: في مضلع رباعي، ما مجموع الزوايا الخارجية؟

540°
180°
720°
360° (Correct answer)

Correct answer: 360°

مجموع الزوايا الخارجية لأي مضلع محدب = 360° دائماً، بصرف النظر عن عدد الأضلاع.

Question 76: ما مبرهنة الحد الأوسط في الإحصاء؟

توزيع المتوسطات يقترب من الطبيعي مع زيادة حجم العينة (Correct answer)
حجم العينة لا يؤثر
كل التوزيعات طبيعية
المتوسط دائماً في الوسط

Correct answer: توزيع المتوسطات يقترب من الطبيعي مع زيادة حجم العينة

مبرهنة الحد الأوسط: مع زيادة حجم العينة (n≥30)، يصبح توزيع المتوسطات قريباً من الطبيعي بغض النظر عن التوزيع الأصلي.

Question 77: An object has a mass of 2 kg and velocity of 3 m/s. What is its kinetic energy?

9 J (Correct answer)
6 J
12 J
18 J

Correct answer: 9 J

KE = ½mv² = ½ × 2 × 3² = ½ × 2 × 9 = 9 J. Kinetic energy depends on the square of velocity, so doubling speed quadruples kinetic energy.

Question 78: What happens to the gravitational force between two objects if the distance between them is doubled?

It remains the same
It becomes one-quarter (Correct answer)
It doubles
It halves

Correct answer: It becomes one-quarter

Gravitational force follows the inverse square law: F = Gm₁m₂/r². If r doubles (2r), F = Gm₁m₂/(2r)² = Gm₁m₂/4r² = F/4. The force becomes one-quarter of the original.

Question 79: Balance the equation: Fe + O₂ → __Fe₂O₃

2Fe + O₂ → Fe₂O₃
3Fe + 2O₂ → Fe₃O₂
Fe + O₂ → Fe₂O₃
4Fe + 3O₂ → 2Fe₂O₃ (Correct answer)

Correct answer: 4Fe + 3O₂ → 2Fe₂O₃

Balanced: 4Fe + 3O₂ → 2Fe₂O₃. Check: Fe: 4 = 2×2 = 4 ✓. O: 3×2 = 6 = 2×3 = 6 ✓. Both sides have equal atoms of each element.

Question 80: What is the pH of a solution with a hydrogen ion concentration of 10⁻³ M?

-3
3 (Correct answer)
7
11

Correct answer: 3

pH = -log[H⁺] = -log(10⁻³) = -(-3) = 3. A pH of 3 is acidic (pH < 7). The pH scale measures acidity/basicity logarithmically.

Question 81: Choose the correct sentence:

If I be you, I would study harder.
If I am you, I will study harder.
If I were you, I would study harder. (Correct answer)
If I was you, I would study harder.

Correct answer: If I were you, I would study harder.

The subjunctive mood uses 'were' (not 'was') for hypothetical conditions with all subjects. 'If I were you' is the correct form for second conditional expressing unreal/imaginary situations.

Question 82: What is the sum of the first 20 terms of the arithmetic sequence: 3, 7, 11, 15, ...?

820
780
860 (Correct answer)
920

Correct answer: 860

First term a₁ = 3, common difference d = 4. The 20th term: a₂₀ = 3 + (20-1)(4) = 3 + 76 = 79. Sum = n/2 × (a₁ + aₙ) = 20/2 × (3 + 79) = 10 × 82 = 820. Wait: 10 × 82 = 820. Let me recalculate. S₂₀ = 20/2 × (2(3) + (20-1)(4)) = 10 × (6 + 76) = 10 × 82 = 820.

Question 83: What is the past participle of 'to choose'?

Chosen (Correct answer)
Chose
Choosed
Choosing

Correct answer: Chosen

Choose (base) → chose (past tense) → chosen (past participle). 'Chosen' is used in perfect tenses ('I have chosen') and passive voice ('was chosen'). 'Choosed' is not a valid English form.

Question 84: What is the capital city of Saudi Arabia?

Dammam
Riyadh (Correct answer)
Makkah
Jeddah

Correct answer: Riyadh

Riyadh is the capital and largest city of Saudi Arabia. It serves as the political, administrative, and financial center. The name 'Riyadh' comes from the Arabic word for gardens, reflecting the city's historical oasis setting.

Question 85: What type of bond forms between sodium (Na) and chlorine (Cl)?

Hydrogen bond
Metallic bond
Ionic bond (Correct answer)
Covalent bond

Correct answer: Ionic bond

Sodium (metal, low electronegativity) transfers an electron to chlorine (non-metal, high electronegativity), forming Na⁺ and Cl⁻ ions. The electrostatic attraction between these oppositely charged ions is an ionic bond.

Question 86: A projectile is launched at 45° with an initial velocity of 20 m/s. What is the horizontal component of velocity?

10 m/s
20/√2 ≈ 14.14 m/s (Correct answer)
10√2 m/s
20 m/s

Correct answer: 20/√2 ≈ 14.14 m/s

Horizontal component: vₓ = v₀cos(45°) = 20 × cos(45°) = 20 × (√2/2) = 20/√2 ≈ 14.14 m/s. At 45°, both horizontal and vertical components are equal.

Question 87: من أبرز سمات شعر عصر صدر الإسلام:

الإفراط في الزخرف البديعي
التعقيد والغموض
الوضوح والبعد عن التكلف (Correct answer)
الاعتماد على الأساطير اليونانية

Correct answer: الوضوح والبعد عن التكلف

شعر صدر الإسلام تأثر بالقرآن الكريم فاتسم بالوضوح والصدق ونبذ التكلف.

Question 88: In a right triangle, if sin(θ) = 3/5, what is cos(θ)?

3/4
5/3
5/4
4/5 (Correct answer)

Correct answer: 4/5

Using the Pythagorean identity: sin²(θ) + cos²(θ) = 1. So cos²(θ) = 1 - (3/5)² = 1 - 9/25 = 16/25. Therefore cos(θ) = 4/5 (positive in the first quadrant).

Question 89: What is the value of 5! (5 factorial)?

720
60
25
120 (Correct answer)

Correct answer: 120

5! = 5 × 4 × 3 × 2 × 1 = 120. Factorial is the product of all positive integers up to that number. Factorials are fundamental in permutations and combinations.

Question 90: What organization does Saudi Arabia belong to as a founding member of oil-producing nations?

ASEAN
OPEC (Organization of the Petroleum Exporting Countries) (Correct answer)
EU
NATO

Correct answer: OPEC (Organization of the Petroleum Exporting Countries)

Saudi Arabia is a founding member of OPEC, established in 1960. OPEC coordinates petroleum policies among member countries. Saudi Arabia is OPEC's largest producer and has significant influence on global oil prices and production policies.

Question 91: What is the complementary DNA strand for the sequence 5'-ATCGGA-3'?

3'-ATCGGA-5'
3'-UAGCCU-5'
3'-TAGCCT-5' (Correct answer)
5'-TAGCCT-3'

Correct answer: 3'-TAGCCT-5'

DNA base pairing: A pairs with T, C pairs with G. The complementary strand runs antiparallel (3' to 5'): A→T, T→A, C→G, G→C, G→C, A→T = 3'-TAGCCT-5'.

Question 92: What is the equation of a circle with center (2, -3) and radius 5?

(x-2)² + (y-3)² = 25
(x-2)² + (y+3)² = 5
(x+2)² + (y-3)² = 25
(x-2)² + (y+3)² = 25 (Correct answer)

Correct answer: (x-2)² + (y+3)² = 25

Circle equation: (x-h)² + (y-k)² = r², where (h,k) is the center and r is the radius. Center (2,-3), radius 5: (x-2)² + (y-(-3))² = 5² → (x-2)² + (y+3)² = 25.

Question 93: في جملة: "إنَّ العلمَ نورٌ" ما إعراب "العلمَ"؟

مبتدأ مرفوع
فاعل مرفوع
اسم إنَّ منصوب (Correct answer)
خبر إنَّ مرفوع

Correct answer: اسم إنَّ منصوب

"إنَّ" من الحروف المشبهة بالفعل تنصب المبتدأ ويُسمى اسمها منصوباً.

Question 94: ما المقصود بالتشبيه المُجمَل؟

تشبيه حُذفت منه أداة التشبيه
تشبيه ذُكرت فيه جميع أركانه
تشبيه حُذف منه وجه الشبه (Correct answer)
تشبيه حُذف منه المشبه

Correct answer: تشبيه حُذف منه وجه الشبه

التشبيه المُجمَل هو الذي حُذف منه وجه الشبه، فتكون أركانه: مشبه وأداة ومشبه به.

Question 95: What is the difference between genotype and phenotype?

Genotype applies to plants; phenotype to animals
Genotype is the genetic makeup (alleles); phenotype is the observable physical characteristics (Correct answer)
They are the same thing
Genotype is appearance; phenotype is DNA

Correct answer: Genotype is the genetic makeup (alleles); phenotype is the observable physical characteristics

Genotype refers to the specific alleles an organism carries (e.g., Bb for brown eyes). Phenotype is the observable expression of those genes (e.g., brown eyes). Phenotype results from genotype + environmental influences.

Question 96: What is meiosis and what is its significance?

Cell division producing identical cells
Cell division producing four genetically unique haploid gametes, enabling sexual reproduction and genetic diversity (Correct answer)
Cell growth without division
DNA replication only

Correct answer: Cell division producing four genetically unique haploid gametes, enabling sexual reproduction and genetic diversity

Meiosis involves two divisions (meiosis I and II) producing four haploid gametes (n) from one diploid cell (2n). Genetic diversity is generated through crossing over, independent assortment, and random fertilization. Essential for sexual reproduction.

Question 97: What is homeostasis?

The process of cell division
The maintenance of a stable internal environment despite changes in external conditions (Correct answer)
The study of human homes
The movement of organisms to new habitats

Correct answer: The maintenance of a stable internal environment despite changes in external conditions

Homeostasis is the regulation of internal conditions (temperature, pH, glucose, water balance) within narrow ranges essential for survival. It uses feedback mechanisms: negative feedback (most common — corrects deviations) and positive feedback (amplifies changes, e.g., blood clotting).

Question 98: What is the principle of conservation of momentum?

Heavier objects always have more momentum
Momentum is only conserved in elastic collisions
In an isolated system, total momentum before a collision equals total momentum after (Correct answer)
Momentum always increases in collisions

Correct answer: In an isolated system, total momentum before a collision equals total momentum after

Conservation of momentum states: in an isolated system (no external forces), total momentum is constant. m₁v₁ + m₂v₂ = m₁v₁' + m₂v₂'. This applies to ALL collisions (elastic and inelastic) and is fundamental to the Tahsili physics section.

Question 99: If f(x) = 3x² - 2x + 1, what is f'(x)?

6x + 1
6x - 2 (Correct answer)
3x - 2
6x² - 2

Correct answer: 6x - 2

Using the power rule: d/dx(3x²) = 6x, d/dx(-2x) = -2, d/dx(1) = 0. Therefore f'(x) = 6x - 2. The power rule states d/dx(xⁿ) = nxⁿ⁻¹.

Question 100: What is the role of ribosomes in protein synthesis?

Packaging proteins for export
Transcribing DNA to RNA
Reading mRNA and assembling amino acids into proteins (translation) (Correct answer)
Storing genetic information

Correct answer: Reading mRNA and assembling amino acids into proteins (translation)

Ribosomes are the site of translation — they read the mRNA codon sequence and assemble the corresponding amino acids into polypeptide chains. Ribosomes consist of a large and small subunit made of rRNA and proteins.

Question 101: مَن أشهر شعراء المعلقات في العصر الجاهلي؟

امرؤ القيس (Correct answer)
أبو نواس
المتنبي
أبو تمام

Correct answer: امرؤ القيس

امرؤ القيس هو أشهر شعراء المعلقات وصاحب معلقة "قفا نبكِ".

Question 102: أيٌّ من الكلمات الآتية مشتقة على وزن "فَعَّال" للمبالغة؟

كاتب
عَلَّام (Correct answer)
مكتوب
أكبر

Correct answer: عَلَّام

"عَلَّام" على وزن "فَعَّال" وهو صيغة من صيغ المبالغة.

Question 103: What is the SI unit of force?

Newton (Correct answer)
Watt
Joule
Pascal

Correct answer: Newton

The Newton (N) is the SI unit of force. 1 N = 1 kg⋅m/s². It is defined as the force needed to accelerate 1 kg of mass by 1 m/s². Named after Sir Isaac Newton.

Question 104: Simplify: (x² - 9)/(x + 3)

x - 9
x² - 3
x - 3 (Correct answer)
x + 3

Correct answer: x - 3

Factor the numerator as a difference of squares: x² - 9 = (x+3)(x-3). Then: (x+3)(x-3)/(x+3) = x - 3 (where x ≠ -3).

Question 105: What is the function of mitochondria in a cell?

Cell division
Protein synthesis
Cellular respiration — producing ATP (energy) through oxidative phosphorylation (Correct answer)
Photosynthesis

Correct answer: Cellular respiration — producing ATP (energy) through oxidative phosphorylation

Mitochondria are the 'powerhouses of the cell,' producing ATP through cellular respiration (glycolysis, Krebs cycle, electron transport chain). They convert glucose and oxygen into ATP, CO₂, and water.

Question 106: ما التحويل الهندسي الذي يحافظ على الشكل والحجم مع نقل الموضع؟

قطع الشكل
التكبير والتصغير
الانعكاس مع تغيير الحجم
الانتقال (الإزاحة) (Correct answer)

Correct answer: الانتقال (الإزاحة)

الانتقال (Translation) ينقل الشكل من موضع لآخر دون تغيير في الحجم أو الشكل.

Question 107: الهمزة في كلمة "مسألة" همزةٌ:

متطرفة
متوسطة على السطر (Correct answer)
همزة قطع في بداية الكلمة
همزة وصل

Correct answer: متوسطة على السطر

همزة "مسألة" جاءت في وسط الكلمة وكُتبت على السطر لأن ما قبلها ساكن.

Question 108: ما خصائص متوازي الأضلاع؟

زوايا الأربعة قوائم
أضلاعه الأربعة متساوية
الأضلاع المتقابلة متوازية ومتساوية والزوايا المتقابلة متساوية (Correct answer)
أقطاره متساوية فقط

Correct answer: الأضلاع المتقابلة متوازية ومتساوية والزوايا المتقابلة متساوية

متوازي الأضلاع: الضلعان المتقابلان متوازيان ومتساويان، والزاويتان المتقابلتان متساويتان، والأقطار تنصف بعضها.

Question 109: What is the integral of ∫ 2x dx?

x + C
2 + C
x² + C (Correct answer)
2x² + C

Correct answer: x² + C

Using the power rule for integration: ∫ 2x dx = 2 × (x²/2) + C = x² + C. The constant of integration C is always added for indefinite integrals.

Question 110: في توزيع البيانات، ماذا تعني قيمة الانحراف المعياري الكبيرة؟

البيانات متشتّتة ومتفرقة بعيدة عن المتوسط (Correct answer)
المتوسط كبير
البيانات متمركزة قرب المتوسط
المتوسط صغير

Correct answer: البيانات متشتّتة ومتفرقة بعيدة عن المتوسط

الانحراف المعياري الكبير = تشتّت كبير = البيانات بعيدة عن المتوسط. الصغير = تمركز حول المتوسط.

Tahsili (SAAT) — Saudi Achievement Test

The Tahsili (SAAT) exam, administered by ETEC/Qiyas, measures Saudi secondary-school graduates' mastery of core curriculum in Biology, Chemistry, Physics, Mathematics, and General Knowledge for university admission.

110

Questions

125 min

Time Limit

65%

To Pass

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