Keystones — Cornerstone
Five GCSE retrieval questions · 18 December 2022 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 1⁄5 + 3⁄5
Answer: 4⁄5 -
2. Algebra Two-step equations
Solve: 6x + 11 = 65
Answer: x = 9 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 8cm and b = 13cm
Answer: 15.26cm -
4. Ratio Sharing in a ratio
Divide 92 in the ratio 1:1:2
Answer: 23, 23 and 46 -
5. Statistics Mean
Calculate the mean of: 36, 31, 39, 18, 38, 25, 29
Answer: 30.9