Keystones — Cornerstone
Five GCSE retrieval questions · 26 May 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 42 + 70
Answer: 42 + 70 = 112 -
2. Algebra
Simplify: 7x + 3x
Answer: 10x -
3. Geometry
Opposite = 14cm, hypotenuse = 19.8cm. Find the angle
Answer: 45° (approximately) -
4. Ratio
Calculate 25% of 110
Answer: 27.5 -
5. Statistics
Calculate the mean of: 5, 15, 37, 10, 35, 8, 8, 43
Answer: 20.1