Keystones — Capstone
Five GCSE retrieval questions · 4 December 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 117. What are the numbers?
Answer: 38, 39, and 40 -
2. Algebra
Solve: x⁄5 = 7.8
Answer: x = 39 -
3. Geometry
Find the distance between (-6, -1) and (7, 5)
Answer: 14.32 -
4. Ratio
Calculate 14.5% of 978
Answer: 141.81 -
5. Statistics
The mean of 6 numbers is 21. If 5 of them are 42, 33, 39, 25, 45, what is the missing number?
Answer: -58