Keystones — Cornerstone
Five GCSE retrieval questions · 7 July 2025 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 2⁄4 + 4⁄7
Answer: 15⁄14 -
2. Algebra Two-step equations
Solve: 5x + 6 = 51
Answer: x = 9 -
3. Geometry Pythagoras — hypotenuse
Calculate the hypotenuse when a = 3cm and b = 10cm
Answer: 10.44cm -
4. Ratio Sharing in a ratio
Share 21 in the ratio 2:1
Answer: 14 and 7 -
5. Statistics Mean
Find the mean of: 17, 7, 6, 6, 19
Answer: 11