Keystones — Lintel
Five GCSE retrieval questions · 4 May 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
For y = x³ + 15, calculate y when x = 3
Answer: y = 42 -
3. Geometry
Find c if a = 12cm and b = 11cm in a right triangle
Answer: 16.3cm -
4. Ratio
Simplify: 12:12:20
Answer: 3:3:5 -
5. Statistics
Calculate the mean of: 40, 16, 37, 36, 34, 35, 22
Answer: 31.4