Keystones — Cornerstone
Five GCSE retrieval questions · 8 July 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 38 + ? = 100
Answer: 62 -
2. Algebra
Solve: x + 11 = 16
Answer: x = 5 -
3. Geometry
Opposite = 11cm, adjacent = 15cm. Calculate the angle
Answer: 36.3° -
4. Ratio
Simplify: 9:9:12
Answer: 3:3:4 -
5. Statistics
Find the mean of: 20, 5, 20, 5
Answer: 12.5