Keystones — Cornerstone
Five GCSE retrieval questions · 4 October 2022 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 4⁄6 + 1⁄6
Answer: 5⁄6 -
2. Algebra Two-step equations
Solve: 4x + 6 = 18
Answer: x = 3 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 6cm and b = 13cm
Answer: 14.32cm -
4. Ratio Sharing in a ratio
Share 84 in the ratio 2:1
Answer: 56 and 28 -
5. Statistics Mean
Calculate the mean of: 19, 34, 22, 42, 14, 27, 16
Answer: 24.9