Keystones — Cornerstone
Five GCSE retrieval questions · 5 April 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 91 + 80
Answer: 91 + 80 = 171 -
2. Algebra
Expand: 3(4x + 8)
Answer: 12x + 24 -
3. Geometry
Calculate the hypotenuse when a = 12cm and b = 11cm
Answer: 16.28cm -
4. Ratio
Find 51% of 179
Answer: 91.29 -
5. Statistics
Find the mean of: 7, 4, 14, 20, 6
Answer: 10.2