Keystones — Lintel
Five GCSE retrieval questions · 10 November 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.09 in standard form
Answer: 9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 70
Answer: (x + 7)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 60°. Find adjacent side
Answer: 15.5cm -
4. Ratio Mixed ratio problems
Divide 150 in the ratio 1:1:4
Answer: 25, 25 and 100 -
5. Statistics Mean
Calculate the mean of: 22, 11, 36, 30, 44, 41, 7, 21
Answer: 26.5