Keystones — Capstone
Five GCSE retrieval questions · 7 January 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 1⁄6 + 2⁄5 + 2⁄3
Answer: 37⁄30 -
2. Algebra
Solve: x⁄2 = 16.5
Answer: x = 33 -
3. Geometry
Adjacent = 19cm, hypotenuse = 32cm. Find the angle
Answer: 53.6° -
4. Ratio
Calculate 33.6% of 312
Answer: 104.83 -
5. Statistics
The mean of 5 numbers is 38. If 4 of them are 20, 21, 24, 15, what is the missing number?
Answer: 110