Keystones — Cornerstone
Five GCSE retrieval questions · 9 April 2026 · mathsvault.uk/keystones
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1. Number
What is the missing number: 65 + ? = 108
Answer: 43 -
2. Algebra
Expand: 3(4x + 9)
Answer: 12x + 27 -
3. Geometry
Find the area of a circle with radius 10cm
Answer: 314.16cm² -
4. Ratio
Simplify: 15:9:12
Answer: 5:3:4 -
5. Statistics
Find the range of: 30, 37, 17, 24, 29
Answer: 20