Keystones — Cornerstone
Five GCSE retrieval questions · 30 January 2026 · mathsvault.uk/keystones
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1. Number
What is the missing number: 44 + ? = 145
Answer: 101 -
2. Algebra
Solve: 9x = 27
Answer: x = 3 -
3. Geometry
Find the area of a circle with radius 3cm
Answer: 28.27cm² -
4. Ratio
Simplify: 8:10:6
Answer: 4:5:3 -
5. Statistics
Find the mean of: 10, 13, 20, 2
Answer: 11.25