21. In a triangle with angles x, y and z, the mean of x and y is equal to z. What is the value of z?

14. A large pizza for 4 people uses 75g of cheese. How many grams of cheese are needed to serve 16 people?

18. Edward bought 8 trees and 3 roses. Mike bought 3 trees and 8 roses. If each rose costs 45p and Edward paid £1.25 more than Mike, how much does one tree cost?

6. A square has a perimeter of 36 cm. What is its area?

20. In a 25-question maths challenge, you score 5 marks for a correct answer, lose 2 for a wrong answer, and score 0 for no answer. If Daniel got 11 correct and left 7 unanswered, what was his score?

9. Each class has 21 children. How many 7-a-side teams can be formed from 4 such classes?

19. A container weighs 8 kg when full of ice cream and 4.5 kg when half the ice cream has been eaten. What is the mass of the container when only a quarter of the ice cream remains?

12. 250 grams is what percentage of 2 kilograms?

4. You spend £12.87 in a shop and pay with a £20 note. How much change should you receive?

22. What is the result of 63 minus 24?

5. What is the volume of a box that measures 17 cm by 9 cm by 2 cm?

8. Which pair of numbers multiply together to make 72?

16. What is the value of 2.28 multiplied by 0.87?