Keystones — Capstone
Five GCSE retrieval questions · 20 December 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 96. What are the numbers?
Answer: 31, 32, and 33 -
2. Algebra
Factorise fully: 24x² + 28x
Answer: 4x(6x + 7) -
3. Geometry
Find c if a = 16cm and b = 22cm in a right triangle
Answer: 27.2cm -
4. Ratio
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics
The mean of 5 numbers is 25. If 4 of them are 27, 22, 17, 21, what is the missing number?
Answer: 38