Keystones — Lintel
Five GCSE retrieval questions · 18 September 2023 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 102. What are the numbers?
Answer: 33, 34, and 35 -
2. Algebra
Factorise: 6x² + 6x
Answer: 6x(x + 1) -
3. Geometry
A circle has area 78.5cm². Find its radius (dp)
Answer: 5cm -
4. Ratio
Simplify: 24:12:8
Answer: 6:3:2 -
5. Statistics
A bag has 7 red and 3 blue balls. What is the probability of picking a red ball?
Answer: 7⁄10