Keystones — Cornerstone
Five GCSE retrieval questions · 15 September 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 30 + ? = 115
Answer: 85 -
2. Algebra
What is the next term? 7, 21, 63, 189, ...
Answer: 567 -
3. Geometry
Opposite = 15cm, adjacent = 17cm. Calculate the angle
Answer: 41.4° -
4. Ratio
Find 64% of 170
Answer: 108.8 -
5. Statistics
Calculate the range of: 25, 40, 35, 22, 55, 42
Answer: 33