Keystones — Lintel
Five GCSE retrieval questions · 20 November 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.09
Answer: 9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 60°. Find adjacent side
Answer: 19.5cm -
4. Ratio Mixed ratio problems
Divide 55 in the ratio 2:2:1
Answer: 22, 22 and 11 -
5. Statistics Mean
Calculate the mean of: 27, 28, 44, 34, 5, 32
Answer: 28.3