Keystones — Lintel
Five GCSE retrieval questions · 23 October 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
69000
Answer: 6.9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 8
Answer: (x + 8)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 54°. Find adjacent side
Answer: 16.5cm -
4. Ratio Mixed ratio problems
Divide 150 in the ratio 3:1:2
Answer: 75, 25 and 50 -
5. Statistics Mean
Calculate the mean of: 47, 39, 38, 24, 40, 22, 17
Answer: 32.4