Keystones — Lintel
Five GCSE retrieval questions · 30 April 2026 · 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
Factorise: 6x² + 5x
Answer: x(6x + 5) -
3. Geometry
Adjacent = 22cm, hypotenuse = 38cm. Find the angle
Answer: 54.6° -
4. Ratio
Simplify: 9:15:18
Answer: 3:5:6 -
5. Statistics
A spinner has 4 red, 2 blue and 6 green sections. Probability of landing on red?
Answer: 1⁄3