Keystones — Cornerstone
Five GCSE retrieval questions · 1 December 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 41 + 85
Answer: 41 + 85 = 126 -
2. Algebra
Solve: 7x = 98
Answer: x = 14 -
3. Geometry
Opposite = 9cm, hypotenuse = 12.7cm. Find the angle
Answer: 45° (approximately) -
4. Ratio
Simplify the ratio 20:8
Answer: 5:2 -
5. Statistics
Calculate the mean of: 21, 34, 9, 39, 34, 46, 13
Answer: 28