Keystones — Cornerstone
Five GCSE retrieval questions · 2 February 2025 · mathsvault.uk/keystones
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1. Number Adding fractions
Calculate: 3⁄10 + 1⁄10
Answer: 2⁄5 -
2. Algebra Two-step equations
Solve: 5x - 16 = 59
Answer: x = 15 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 7cm and 24cm
Answer: 25cm -
4. Ratio Sharing in a ratio
Divide 261 in the ratio 3:2:4
Answer: 87, 58 and 116 -
5. Statistics Mean
Calculate the mean of: 6, 39, 30, 50, 35, 45, 5, 6
Answer: 27