Keystones — Lintel
Five GCSE retrieval questions · 20 March 2023 · 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: 15x² + 6x
Answer: 3x(5x + 2) -
3. Geometry
Calculate the area of a circle with diameter 14cm
Answer: 153.94cm² -
4. Ratio
Simplify: 6:15:15
Answer: 2:5:5 -
5. Statistics
A spinner has 5 red, 3 blue and 3 green sections. Probability of landing on red?
Answer: 5⁄11