Keystones — Cornerstone
Five GCSE retrieval questions · 10 December 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 84 + 71
Answer: 84 + 71 = 155 -
2. Algebra
Collect like terms: 7x + 8y + 7x + 3y
Answer: 14x + 11y -
3. Geometry
Calculate the area of a right triangle with perpendicular sides 13cm and 14cm
Answer: 91cm² -
4. Ratio
Simplify: 20:16:20
Answer: 5:4:5 -
5. Statistics
Find the mean of: 20, 19, 12
Answer: 17