Keystones — Lintel
Five GCSE retrieval questions · 10 August 2023 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 96. What are the numbers?
Answer: 31, 32, and 33 -
2. Algebra
Factorise fully: 9x² + 21x
Answer: 3x(3x + 7) -
3. Geometry
Find c if a = 18cm and b = 17cm in a right triangle
Answer: 24.8cm -
4. Ratio
Simplify: 10:8:8
Answer: 5:4:4 -
5. Statistics
A spinner has 5 red, 5 blue and 5 green sections. Probability of landing on red?
Answer: 1⁄3