Keystones — Lintel
Five GCSE retrieval questions · 1 April 2022 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 99. What are the numbers?
Answer: 32, 33, and 34 -
2. Algebra
Factorise fully: 12x² + 9x
Answer: 3x(4x + 3) -
3. Geometry
A circle has area 78.5cm². Find its radius (dp)
Answer: 5cm -
4. Ratio
Simplify: 6:12:4
Answer: 3:6:2 -
5. Statistics
Calculate the mean of: 21, 49, 34, 35, 10, 29, 49, 46
Answer: 34.1