Keystones — Lintel
Five GCSE retrieval questions · 8 May 2026 · 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
Factorise: 8x² + 5x
Answer: x(8x + 5) -
3. Geometry
Adjacent = 20cm, hypotenuse = 39cm. Find the angle
Answer: 59.1° -
4. Ratio
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics
A spinner has 4 red, 2 blue and 6 green sections. Probability of landing on red?
Answer: 1⁄3