Keystones — Cornerstone
Five GCSE retrieval questions · 1 August 2021 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 1⁄5 + 1⁄5
Answer: 2⁄5 -
2. Algebra Two-step equations
Solve: 2x + 12 = 34
Answer: x = 11 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 10cm and b = 12cm
Answer: 15.62cm -
4. Ratio Sharing in a ratio
Share 120 in the ratio 1:2
Answer: 40 and 80 -
5. Statistics Mean
Calculate the mean of: 26, 29, 34, 46, 30, 33, 9
Answer: 29.6