Keystones — Lintel
Five GCSE retrieval questions · 24 August 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 120. What are the numbers?
Answer: 39, 40, and 41 -
2. Algebra
Factorise fully: 6x² + 6x
Answer: 3x(2x + 2) -
3. Geometry
Opposite = 16cm, adjacent = 10cm. Calculate the angle
Answer: 58° -
4. Ratio
Simplify: 15:15:9
Answer: 5:5:3 -
5. Statistics
A spinner has 6 red, 6 blue and 4 green sections. Probability of landing on red?
Answer: 3⁄8