Keystones — Lintel
Five GCSE retrieval questions · 9 August 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.007
Answer: 7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 21
Answer: (x + 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 59°. Find adjacent side
Answer: 16cm -
4. Ratio Mixed ratio problems
Divide 96 in the ratio 1:1:2
Answer: 24, 24 and 48 -
5. Statistics Mean
Calculate the mean of: 24, 38, 50, 37, 31, 9, 22, 47
Answer: 32.3