Keystones — Lintel
Five GCSE retrieval questions · 22 February 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 fully: 21x² + 15x
Answer: 3x(7x + 5) -
3. Geometry
Opposite = 20cm, adjacent = 20cm. Calculate the angle
Answer: 45° -
4. Ratio
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics
Calculate the mean of: 6, 35, 34, 30, 6, 28, 33, 44
Answer: 27