O-Level Mathematics 2

Question 1

The mean of five numbers is 8. Four of the numbers are 6, 9, 7, and 10. What is the fifth number?

Accepted Answer

8

Answer

7

Answer

6

Answer

9

Question 2

What is the gradient of the line passing through (2, 3) and (6, 11)?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 3

Solve: 2x - 3 = x + 5

Accepted Answer

8

Answer

6

Answer

7

Answer

9

Question 4

A cylinder has radius 7 cm and height 10 cm. What is its volume? (Use π ≈ 22/7)

Accepted Answer

1540 cm³

Answer

1440 cm³

Answer

1640 cm³

Answer

1240 cm³

Question 5

Express 0.000045 in standard form.

Accepted Answer

4.5 × 10⁻⁵

Answer

4.5 × 10⁻⁴

Answer

4.5 × 10⁻³

Answer

45 × 10⁻⁶

Question 6

If y is directly proportional to x, and y = 12 when x = 4, find y when x = 7.

Accepted Answer

21

Answer

18

Answer

19

Answer

24