Keystones — Cornerstone
Five GCSE retrieval questions · 14 July 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 68 + ? = 155
Answer: 87 -
2. Algebra
Expand: 5(5x + 6)
Answer: 25x + 30 -
3. Geometry
Find the perimeter of a right triangle with sides 3cm, 4cm, 5cm
Answer: 12cm -
4. Ratio
Simplify the ratio 4:16
Answer: 1:4 -
5. Statistics
Find the range of: 40, 17, 46, 23, 29
Answer: 29