N-Level Mathematics 1 — Questions and Answers
Question 1: What is 15 + 27?
- 41
- 42 (Correct answer)
- 43
- 44
Correct answer: 42
15 + 27 = 42. Add the units: 5+7=12 (write 2, carry 1). Add the tens: 1+2+1=4. Answer: 42.
Question 2: Solve: 3x = 18
- x = 4
- x = 5
- x = 6 (Correct answer)
- x = 7
Correct answer: x = 6
Divide both sides by 3: x = 18 ÷ 3 = 6.
Question 3: What is 20% of 150?
- 25
- 30 (Correct answer)
- 35
- 40
Correct answer: 30
20% of 150 = (20/100) × 150 = 0.2 × 150 = 30.
Question 4: A rectangle has length 8 cm and width 4 cm. What is its perimeter?
- 24 cm (Correct answer)
- 32 cm
- 16 cm
- 12 cm
Correct answer: 24 cm
Perimeter = 2(l + w) = 2(8 + 4) = 2 × 12 = 24 cm.
Question 5: Simplify: 3x + 5x - 2x
- 6x (Correct answer)
- 8x
- 5x
- 10x
Correct answer: 6x
Collect like terms: 3x + 5x - 2x = (3+5-2)x = 6x.
Question 6: What is the area of a triangle with base 10 cm and height 6 cm?
- 60 cm²
- 30 cm² (Correct answer)
- 16 cm²
- 40 cm²
Correct answer: 30 cm²
Area of triangle = ½ × base × height = ½ × 10 × 6 = 30 cm².
N-Level Mathematics 1
What is 15 + 27?