Keystones — Cornerstone
Five GCSE retrieval questions · 26 November 2025 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 6⁄8 + 3⁄7
Answer: 33⁄28 -
2. Algebra Two-step equations
Solve: 4x - 8 = 24
Answer: x = 8 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 3cm and b = 7cm
Answer: 7.62cm -
4. Ratio Sharing in a ratio
Divide 135 in the ratio 3:2:4
Answer: 45, 30 and 60 -
5. Statistics Mean
Calculate the mean of: 33, 41, 44, 30, 49, 33, 40
Answer: 38.6