Keystones — Cornerstone
Five GCSE retrieval questions · 24 November 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 60 + ? = 158
Answer: 98 -
2. Algebra
Simplify: 8x + 4x
Answer: 12x -
3. Geometry
Calculate the distance between (1, 8) and (4, 12)
Answer: 5 -
4. Ratio
Simplify the ratio 30:10
Answer: 3:1 -
5. Statistics
Find the mean of: 12, 6, 19, 12
Answer: 12.25