Keystones — Cornerstone
Five GCSE retrieval questions · 24 April 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 61 + ? = 142
Answer: 81 -
2. Algebra
Factorise: 6x + 6
Answer: 2(3x + 3) -
3. Geometry
Opposite = 19cm, adjacent = 12cm. Calculate the angle
Answer: 57.7° -
4. Ratio
Simplify the ratio 15:35
Answer: 3:7 -
5. Statistics
Calculate the mean of: 34, 33, 39, 23, 44, 24, 26
Answer: 31.9