Keystones — Cornerstone
Five GCSE retrieval questions · 6 December 2025 · 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 - 16 = 6
Answer: x = 11 -
3. Geometry Pythagoras — hypotenuse
Find the hypotenuse of a right triangle with sides 3cm and 4cm
Answer: 5cm -
4. Ratio Sharing in a ratio
Share 42 in the ratio 4:3
Answer: 24 and 18 -
5. Statistics Mean
Find the mean of: 14, 5, 20, 4, 10
Answer: 10.6