Keystones — Lintel
Five GCSE retrieval questions · 3 April 2025 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 90. What are the numbers?
Answer: 29, 30, and 31 -
2. Algebra
Factorise fully: 20x² + 24x
Answer: 4x(5x + 6) -
3. Geometry
Adjacent = 21cm, hypotenuse = 41cm. Find the angle
Answer: 59.2° -
4. Ratio
Simplify: 6:4:12
Answer: 3:2:6 -
5. Statistics
A spinner has 2 red, 5 blue and 6 green sections. Probability of landing on red?
Answer: 2⁄13