Keystones — Cornerstone
Five GCSE retrieval questions · 21 November 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 77 + ? = 130
Answer: 53 -
2. Algebra
Expand: 2(3x + 6)
Answer: 6x + 12 -
3. Geometry
Calculate the hypotenuse when a = 6cm and b = 10cm
Answer: 11.66cm -
4. Ratio
Simplify: 20:24:16
Answer: 5:6:4 -
5. Statistics
Find the range of: 19, 22, 9, 12, 18
Answer: 13