Keystones — Cornerstone
Five GCSE retrieval questions · 19 September 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 52 + 36
Answer: 52 + 36 = 88 -
2. Algebra
Solve: 8x = 80
Answer: x = 10 -
3. Geometry
Opposite = 14cm, hypotenuse = 19.8cm. Find the angle
Answer: 45° (approximately) -
4. Ratio
Simplify: 10:6:8
Answer: 5:3:4 -
5. Statistics
Calculate the mean of: 9, 47, 19, 31, 18, 29, 36
Answer: 27