HBS HBS Mathematics

Question 1

A train travels 240 miles in 3 hours. What is its average speed in miles per hour?

Accepted Answer

80 mph

Answer

Average speed = distance ÷ time = 240 ÷ 3 = 80 mph.

Question 2

What is 15% of 240?

Accepted Answer

36

Answer

15% of 240 = 0.15 × 240 = 36.

Question 3

A rectangle has a perimeter of 56 cm. If its length is 18 cm, what is its width?

Accepted Answer

10 cm

Answer

Perimeter = 2(length + width), so 56 = 2(18 + w), giving w = 10 cm.

Question 4

What is the value of 7² + 5²?

Accepted Answer

74

Answer

7² = 49 and 5² = 25, so 49 + 25 = 74.

Question 5

If a bag contains 4 red, 6 blue, and 2 green marbles, what fraction of the marbles are blue?

Accepted Answer

1/2

Answer

Total marbles = 12; blue = 6; fraction = 6/12 = 1/2.

HBS - Henrietta Barnett School Practice Test