Keystones — Cornerstone
Five GCSE retrieval questions · 10 June 2026 · mathsvault.uk/keystones
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1. Number
What is the missing number: 62 + ? = 144
Answer: 82 -
2. Algebra
Solve: 8x + 6 = x + 48
Answer: x = 6 -
3. Geometry
Find the hypotenuse of a right triangle with sides 5cm and 12cm
Answer: 13cm -
4. Ratio
Find 55% of 280
Answer: 154 -
5. Statistics
Find the range of: 30, 13, 19, 34, 20
Answer: 21