Keystones — Lintel
Five GCSE retrieval questions · 7 October 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
40000
Answer: 4 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 60°. Find adjacent side
Answer: 13.5cm -
4. Ratio Mixed ratio problems
Divide 144 in the ratio 4:4:1
Answer: 64, 64 and 16 -
5. Statistics Mean
Calculate the mean of: 10, 38, 45, 25, 19, 15, 22, 19
Answer: 24.1