Keystones — Cornerstone
Five GCSE retrieval questions · 14 October 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 52 + ? = 138
Answer: 86 -
2. Algebra
Solve: x + 13 = 29
Answer: x = 16 -
3. Geometry
Opposite = 18cm, adjacent = 13cm. Calculate the angle
Answer: 54.2° -
4. Ratio
Simplify the ratio 8:32
Answer: 1:4 -
5. Statistics
Calculate the range of: 46, 49, 88, 51, 112, 52
Answer: 66