Keystones — Lintel
Five GCSE retrieval questions · 6 December 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: 3x = 24
Answer: x = 8 -
3. Geometry
Opposite = 11cm, adjacent = 16cm. Calculate the angle
Answer: 34.5° -
4. Ratio
Simplify: 18:6:6
Answer: 3:1:1 -
5. Statistics
Calculate the mean of: 17, 37, 34, 5, 46, 12
Answer: 25.2