Keystones — Cornerstone
Five GCSE retrieval questions · 14 July 2026 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 6⁄10 + 2⁄10
Answer: 4⁄5 -
2. Algebra Two-step equations
Solve: 3x - 5 = 25
Answer: x = 10 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 10cm and b = 5cm
Answer: 11.18cm -
4. Ratio Sharing in a ratio
Share 80 in the ratio 3:2
Answer: 48 and 32 -
5. Statistics Mean
Calculate the mean of: 38, 10, 18, 40, 29, 10, 19, 49
Answer: 26.6