N-Level Mathematics 3 — Questions and Answers
Question 1: A bus travels 60 km in 1.5 hours. What is its average speed?
- 30 km/h
- 40 km/h (Correct answer)
- 45 km/h
- 50 km/h
Correct answer: 40 km/h
Speed = Distance ÷ Time = 60 ÷ 1.5 = 40 km/h.
Question 2: Solve: 2x + 3 = 11
- x = 3
- x = 4 (Correct answer)
- x = 5
- x = 6
Correct answer: x = 4
2x = 11 - 3 = 8. x = 8 ÷ 2 = 4.
Question 3: A bag has 4 red balls and 6 blue balls. What is the probability of picking a blue ball?
- 2/5
- 3/5 (Correct answer)
- 4/5
- 1/2
Correct answer: 3/5
Total balls = 4 + 6 = 10. P(blue) = 6/10 = 3/5.
Question 4: What is the HCF of 12 and 18?
- 3
- 4
- 6 (Correct answer)
- 9
Correct answer: 6
Factors of 12: 1, 2, 3, 4, 6, 12. Factors of 18: 1, 2, 3, 6, 9, 18. HCF = 6.
Question 5: Expand: 3(2x - 4)
- 6x - 4
- 6x - 12 (Correct answer)
- 6x + 12
- 5x - 12
Correct answer: 6x - 12
3(2x - 4) = 3×2x - 3×4 = 6x - 12.
Question 6: The mean of 4, 7, 9, and 8 is:
- 6
- 7
- 8 (Correct answer)
- 9
Correct answer: 8
Mean = (4+7+9+8) ÷ 4 = 28 ÷ 4 = 7. Wait: 4+7+9+8 = 28, 28÷4 = 7. The answer is 7.
N-Level Mathematics 3
A bus travels 60 km in 1.5 hours.
What is its average speed?