Keystones — Cornerstone
Five GCSE retrieval questions · 18 July 2026 · mathsvault.uk/keystones
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1. Number
What is the missing number: 41 + ? = 182
Answer: 141 -
2. Algebra
Expand: 6(6x + 8)
Answer: 36x + 48 -
3. Geometry
Opposite = 10cm, hypotenuse = 11.5cm. Find the angle
Answer: 60° (approximately) -
4. Ratio
Find 56% of 68
Answer: 38.08 -
5. Statistics
Calculate the range of: 49, 72, 65, 42, 64, 69
Answer: 30