Keystones — Cornerstone
Five GCSE retrieval questions · 9 December 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 38 + 24
Answer: 38 + 24 = 62 -
2. Algebra
Solve: 8x - 4 = 6x + 2
Answer: x = 3 -
3. Geometry
Opposite = 10cm, hypotenuse = 11.5cm. Find the angle
Answer: 60° (approximately) -
4. Ratio
Simplify: 15:9:12
Answer: 5:3:4 -
5. Statistics
Find the mean of: 15, 20, 8, 3, 12
Answer: 11.6