Keystones — Cornerstone
Five GCSE retrieval questions · 30 December 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 88 + ? = 175
Answer: 87 -
2. Algebra
What is the next term? 6, 24, 96, 384, ...
Answer: 1536 -
3. Geometry
Opposite = 20cm, adjacent = 10cm. Calculate the angle
Answer: 63.4° -
4. Ratio
Simplify: 12:15:12
Answer: 4:5:4 -
5. Statistics
Calculate the mean of: 35, 5, 16, 10, 48, 47, 14, 34
Answer: 26.1