Keystones — Cornerstone
Five GCSE retrieval questions · 10 April 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 394 + 144
Answer: 394 + 144 = 538 -
2. Algebra
What is the next term? 5, 15, 45, 135, ...
Answer: 405 -
3. Geometry
Opposite = 12cm, adjacent = 17cm. Calculate the angle
Answer: 35.2° -
4. Ratio
Simplify: 6:9:18
Answer: 2:3:6 -
5. Statistics
Find the mean of: 18, 10, 5, 15
Answer: 12