QTS Numeracy Skills for Teachers 3

Question 1

A class set of 30 books costs £127.50. What is the cost per book?

Accepted Answer

£4.25

Answer

£127.50 ÷ 30 = £4.25 per book.

Question 2

What is the median of: 14, 7, 19, 3, 11, 22, 8?

Accepted Answer

11

Answer

Ordered: 3, 7, 8, 11, 14, 19, 22. The middle value (4th of 7) is 11.

Question 3

A school trip costs £12.50 per pupil. There are 34 pupils attending. What is the total cost?

Accepted Answer

£425

Answer

£12.50 × 34 = £425. (£12.50 × 30 = £375; £12.50 × 4 = £50; total = £425.)

Question 4

A pupil's mark improved from 48 to 60. What is the percentage increase?

Accepted Answer

25%

Answer

Increase = 12. Percentage increase = (12/48) × 100 = 25%.

Question 5

What is 7 squared minus 4 cubed?

Accepted Answer

−15

Answer

7² = 49. 4³ = 64. 49 − 64 = −15.

QTS Practice Test