Keystones — Cornerstone
Five GCSE retrieval questions · 8 April 2026 · mathsvault.uk/keystones
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1. Number
What is √25?
Answer: 5 -
2. Algebra
Solve: x + 10 = 22
Answer: x = 12 -
3. Geometry
Opposite = 10cm, adjacent = 19cm. Calculate the angle
Answer: 27.8° -
4. Ratio
Simplify: 20:12:20
Answer: 5:3:5 -
5. Statistics
Calculate the mean of: 20, 50, 6, 19, 35, 45, 49, 43
Answer: 33.4