Keystones — Capstone
Five GCSE retrieval questions · 14 February 2023 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 99. What are the numbers?
Answer: 32, 33, and 34 -
2. Algebra
Factorise fully: 20x² + 24x
Answer: 4x(5x + 6) -
3. Geometry
Adjacent = 12cm, hypotenuse = 23cm. Find the angle
Answer: 58.6° -
4. Ratio
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 22. If 5 of them are 31, 15, 25, 32, 40, what is the missing number?
Answer: -11