Keystones — Cornerstone
Five GCSE retrieval questions · 6 April 2025 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 1⁄6 + 4⁄6
Answer: 5⁄6 -
2. Algebra Two-step equations
Solve: 8x - 20 = 52
Answer: x = 9 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 10cm and b = 11cm
Answer: 14.87cm -
4. Ratio Sharing in a ratio
Divide 174 in the ratio 1:2:3
Answer: 29, 58 and 87 -
5. Statistics Mean
Calculate the mean of: 15, 12, 21, 42, 10, 29
Answer: 21.5