Keystones — Capstone
Five GCSE retrieval questions · 7 June 2025 · mathsvault.uk/keystones
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1. Number
Find the missing number: 9.74 + □ = 18.99
Answer: □ = 9.25 -
2. Algebra
Factorise fully: 6x² + 6x
Answer: 3x(2x + 2) -
3. Geometry
Adjacent = 24cm, hypotenuse = 29cm. Find the angle
Answer: 34.1° -
4. Ratio
Calculate 49% of 498
Answer: 244.02 -
5. Statistics
The mean of 6 numbers is 34. If 5 of them are 40, 35, 38, 42, 40, what is the missing number?
Answer: 9