BPP Mathematics 4 — Questions and Answers
Question 1: What is the sum of interior angles of a hexagon?
- 540°
- 720° (Correct answer)
- 900°
- 1080°
Correct answer: 720°
Sum of interior angles = (n - 2) × 180° = (6 - 2) × 180° = 720°.
Question 2: Which of the following is a rational number?
- π
- √5
- √9 (Correct answer)
- √2
Correct answer: √9
√9 = 3, which is a rational number; the others are irrational.
Question 3: Evaluate: (2³ × 2⁴) / 2⁵
- 2
- 4 (Correct answer)
- 8
- 16
Correct answer: 4
2³ × 2⁴ = 2⁷; 2⁷ / 2⁵ = 2² = 4.
Question 4: If a shirt originally costs $80 and is on sale for 25% off, what is the sale price?
- $55
- $60 (Correct answer)
- $65
- $70
Correct answer: $60
Discount = 25% × $80 = $20; sale price = $80 - $20 = $60.
Question 5: What are the roots of the equation x² - 5x + 6 = 0?
- x = 1 and x = 6
- x = 2 and x = 3 (Correct answer)
- x = -2 and x = -3
- x = 3 and x = -2
Correct answer: x = 2 and x = 3
Factor as (x - 2)(x - 3) = 0, giving x = 2 and x = 3.
Question 6: Which of the following represents a direct proportion?
- y = x + 5
- y = x/3 (Correct answer)
- y = x²
- y = 1/x
Correct answer: y = x/3
y = x/3 means y = (1/3)x, a direct proportion with constant k = 1/3.
Question 7: A cylinder has radius 4 cm and height 10 cm. What is its volume? (Use π ≈ 3.14)
- 160.4 cm³
- 401.92 cm³
- 502.4 cm³ (Correct answer)
- 125.6 cm³
Correct answer: 502.4 cm³
V = πr²h = 3.14 × 16 × 10 = 502.4 cm³.
BPP Mathematics 4
What is the sum of interior angles of a hexagon?