ITBS Iowa Test of Basic Skills (ITBS) 6th Grade 5 — Questions and Answers
Question 1: A spinner has 8 equal sections numbered 1–8. What is the probability of landing on a prime number?
- 3/8
- 1/2 (Correct answer)
- 5/8
- 1/4
Correct answer: 1/2
Prime numbers from 1–8 are 2, 3, 5, 7 — that's 4 out of 8 sections, or 1/2.
Question 2: In which type of writing does the author primarily aim to convince the reader of a point of view?
- Narrative
- Descriptive
- Persuasive (Correct answer)
- Expository
Correct answer: Persuasive
Persuasive writing is designed to change or influence the reader's opinion or behavior.
Question 3: What is the main purpose of the Lewis and Clark Expedition (1804–1806)?
- To establish trade routes to Asia
- To explore and map the territory of the Louisiana Purchase (Correct answer)
- To negotiate treaties with European nations
- To find gold in the western territories
Correct answer: To explore and map the territory of the Louisiana Purchase
President Jefferson sent Lewis and Clark to explore the newly acquired Louisiana Purchase and find a route to the Pacific Ocean.
Question 4: What is the least common multiple (LCM) of 6 and 8?
- 12
- 24 (Correct answer)
- 48
- 16
Correct answer: 24
Multiples of 6: 6, 12, 18, 24; multiples of 8: 8, 16, 24 — the LCM is 24.
Question 5: A plant placed in a dark room for two weeks would most likely show which result?
- Increased growth due to stored energy
- Yellowing and wilting from lack of photosynthesis (Correct answer)
- No change because plants store sunlight
- Flowering because of reduced light exposure
Correct answer: Yellowing and wilting from lack of photosynthesis
Without light, a plant cannot perform photosynthesis and will lose chlorophyll, causing yellowing and eventual death.
Question 6: Which sentence is written in the passive voice?
- The dog chased the cat.
- Maria completed her homework.
- The experiment was conducted by the students. (Correct answer)
- He scored the winning goal.
Correct answer: The experiment was conducted by the students.
In passive voice, the subject receives the action; 'the experiment was conducted' has the subject receiving the action.
Question 7: On a coordinate plane, Point A is at (−3, 4) and Point B is at (5, 4). What is the distance between them?
- 6 units
- 8 units (Correct answer)
- 4 units
- 10 units
Correct answer: 8 units
Since both points share the same y-coordinate, the distance is |5 − (−3)| = |8| = 8 units.
ITBS Iowa Test of Basic Skills (ITBS) 6th Grade 5
A spinner has 8 equal sections numbered 1–8.
What is the probability of landing on a prime number?