Keystones — Cornerstone
Five GCSE retrieval questions · 16 August 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 55 + 25
Answer: 55 + 25 = 80 -
2. Algebra
Simplify: 3x + 7x
Answer: 10x -
3. Geometry
Opposite = 11cm, hypotenuse = 15.6cm. Find the angle
Answer: 45° (approximately) -
4. Ratio
Simplify the ratio 28:16
Answer: 7:4 -
5. Statistics
Calculate the mean of: 44, 50, 27, 5, 46, 9, 31
Answer: 30.3