Keystones — Capstone
Five GCSE retrieval questions · 14 June 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 123. What are the numbers?
Answer: 40, 41, and 42 -
2. Algebra
Solve: x⁄7 = 3.5714285714286
Answer: x = 25 -
3. Geometry
A right triangle has hypotenuse 17cm and one side 8cm. Find its area
Answer: 60cm² -
4. Ratio
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics
The mean of 5 numbers is 25. If 4 of them are 30, 16, 42, 39, what is the missing number?
Answer: -2