Keystones — Cornerstone
Five GCSE retrieval questions · 2 April 2025 · mathsvault.uk/keystones
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1. Number Adding fractions
Add: 3⁄4 + 2⁄5
Answer: 23⁄20 -
2. Algebra Two-step equations
Solve: 3x - 18 = -3
Answer: x = 5 -
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 70 in the ratio 4:3
Answer: 40 and 30 -
5. Statistics Mean
Find the mean of: 10, 17, 2, 12, 17
Answer: 11.6