Keystones — Cornerstone
Five GCSE retrieval questions · 18 August 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 58 + ? = 140
Answer: 82 -
2. Algebra
Expand: 5(3x + 3)
Answer: 15x + 15 -
3. Geometry
Opposite = 13cm, adjacent = 10cm. Calculate the angle
Answer: 52.4° -
4. Ratio
Calculate 25% of 81
Answer: 20.25 -
5. Statistics
Find the mean of: 4, 2, 2, 6
Answer: 3.5