Keystones — Capstone
Five GCSE retrieval questions · 16 October 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 991 + 737
Answer: 1728 -
2. Algebra
Factorise fully: 16x² + 8x
Answer: 4x(4x + 2) -
3. Geometry
Find the distance between (-5, -5) and (11, 6)
Answer: 19.42 -
4. Ratio
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics
The mean of 5 numbers is 23. If 4 of them are 34, 32, 42, 28, what is the missing number?
Answer: -21