Keystones — Cornerstone
Five GCSE retrieval questions · 14 August 2026 · mathsvault.uk/keystones
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1. Number
Add: 42.48 + 53.68
Answer: 42.48 + 53.68 = 96.16 -
2. Algebra
What is the next term? 5, 10, 20, 40, ...
Answer: 80 -
3. Geometry
Calculate the hypotenuse when a = 10cm and b = 9cm
Answer: 13.45cm -
4. Ratio
Simplify: 18:15:12
Answer: 6:5:4 -
5. Statistics
Calculate the mean of: 44, 42, 30, 19, 46, 37, 41
Answer: 37