Keystones — Cornerstone
Five GCSE retrieval questions · 11 February 2026 · mathsvault.uk/keystones
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1. Number
What is the missing number: 34 + ? = 104
Answer: 70 -
2. Algebra
Find the next term: 20, 29, 38, 47, ...
Answer: 56 -
3. Geometry
Find the hypotenuse of a right triangle with sides 3cm and 4cm
Answer: 5cm -
4. Ratio
Simplify the ratio 15:40
Answer: 3:8 -
5. Statistics
Find the range of: 44, 43, 29, 20, 26
Answer: 24