N-Level Mathematics

Question 1

What is 15 + 27?

Accepted Answer

42

Answer

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

Accepted Answer

x = 6

Answer

Divide both sides by 3: x = 18 ÷ 3 = 6.

Question 3

What is 20% of 150?

Accepted Answer

30

Answer

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?

Accepted Answer

24 cm

Answer

Perimeter = 2(l + w) = 2(8 + 4) = 2 × 12 = 24 cm.

Question 5

Simplify: 3x + 5x - 2x

Accepted Answer

6x

Answer

Collect like terms: 3x + 5x - 2x = (3+5-2)x = 6x.

GCE N-Level Practice Test