Keystones — Bedrock
Five GCSE retrieval questions · 29 January 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 39 + 36
Answer: 39 + 36 = 75 -
2. Algebra
Factorise: 10x + 14
Answer: 2(5x + 7) -
3. Geometry
Find the area of a right triangle with base 9cm and height 4cm
Answer: 18cm² -
4. Ratio
Simplify the ratio 10:25
Answer: 2:5 -
5. Statistics
Find the mean of: 20, 10, 11
Answer: 13.666666666667