Keystones — Cornerstone
Five GCSE retrieval questions · 24 September 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 37 + 72
Answer: 37 + 72 = 109 -
2. Algebra
For y = x³ + 6, calculate y when x = 3
Answer: y = 33 -
3. Geometry
Opposite = 9cm, hypotenuse = 10.4cm. Find the angle
Answer: 60° (approximately) -
4. Ratio
Simplify the ratio 15:40
Answer: 3:8 -
5. Statistics
Calculate the mean of: 17, 40, 13, 16, 29, 7, 49
Answer: 24.4