Keystones — Cornerstone
Five GCSE retrieval questions · 12 August 2025 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 4⁄6 + 2⁄3
Answer: 4⁄3 -
2. Algebra Two-step equations
Solve: 6x + 12 = 60
Answer: x = 8 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 8cm and b = 13cm
Answer: 15.26cm -
4. Ratio Sharing in a ratio
Share 56 in the ratio 1:3
Answer: 14 and 42 -
5. Statistics Mean
Find the mean of: 9, 3, 17, 2, 17
Answer: 9.6