Keystones — Cornerstone
Five GCSE retrieval questions · 17 November 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 2 × 3
Answer: 6 -
2. Algebra
Solve: 2x = 8
Answer: x = 4 -
3. Geometry
Opposite = 14cm, hypotenuse = 19.8cm. Find the angle
Answer: 45° (approximately) -
4. Ratio
Find 66% of 388
Answer: 256.08 -
5. Statistics
Calculate the mean of: 40, 5, 38, 17, 10, 27, 21
Answer: 22.6