Keystones — Capstone
Five GCSE retrieval questions · 10 November 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 126. What are the numbers?
Answer: 41, 42, and 43 -
2. Algebra
Solve: x⁄8 = 2.5
Answer: x = 20 -
3. Geometry
A right triangle has hypotenuse 10cm and one side 6cm. Find its area
Answer: 24cm² -
4. Ratio
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics
The mean of 4 numbers is 39. If 3 of them are 23, 25, 25, what is the missing number?
Answer: 83