Keystones — Capstone
Five GCSE retrieval questions · 26 May 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 990 + 625
Answer: 1615 -
2. Algebra
Factorise fully: 8x² + 8x
Answer: 2x(4x + 4) -
3. Geometry
Adjacent = 18cm, hypotenuse = 32cm. Find the angle
Answer: 55.8° -
4. Ratio
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics
The mean of 6 numbers is 39. If 5 of them are 16, 25, 38, 26, 17, what is the missing number?
Answer: 112