Keystones — Cornerstone
Five GCSE retrieval questions · 23 July 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 669 + 266
Answer: 669 + 266 = 935 -
2. Algebra
Solve: x + 13 = 21
Answer: x = 8 -
3. Geometry
Opposite = 13cm, hypotenuse = 18.4cm. Find the angle
Answer: 45° (approximately) -
4. Ratio
Simplify the ratio 21:15
Answer: 7:5 -
5. Statistics
Find the mean of: 3, 16, 11, 8
Answer: 9.5