Keystones — Lintel
Five GCSE retrieval questions · 30 January 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
52000000
Answer: 5.2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 7
Answer: (x + 7)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 25°. Find adjacent side
Answer: 19.9cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 22, 46, 44, 50, 5, 31, 36, 17
Answer: 31.4