HBS HBS Mathematics 3

Question 1

A rectangle has an area of 84 cm² and a width of 7 cm. What is its length?

Accepted Answer

12 cm

Answer

Length = area ÷ width = 84 ÷ 7 = 12 cm.

Question 2

Which of the following is a multiple of both 6 and 9?

Accepted Answer

36

Answer

36 = 6×6 and 36 = 9×4, making it a multiple of both.

Question 3

A car costs $18,000. After a 15% discount, how much does it cost?

Accepted Answer

$15,300

Answer

Discount = 15% × $18,000 = $2,700; price = $18,000 − $2,700 = $15,300.

Question 4

What is the sum of interior angles of a pentagon?

Accepted Answer

540°

Answer

Sum of interior angles = (n − 2) × 180° = (5 − 2) × 180° = 540°.

Question 5

If 5 apples cost $3.50, how much do 8 apples cost?

Accepted Answer

$5.60

Answer

Cost per apple = $3.50 ÷ 5 = $0.70; 8 × $0.70 = $5.60.

HBS - Henrietta Barnett School Practice Test