Keystones — Lintel
Five GCSE retrieval questions · 12 February 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 3,200,000 in standard form
Answer: 3.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 40
Answer: (x + 4)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 25°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.5cm -
4. Ratio Mixed ratio problems
Divide 207 in the ratio 1:4:4
Answer: 23, 92 and 92 -
5. Statistics Mean
Calculate the mean of: 50, 16, 24, 40, 27, 50, 6, 27
Answer: 30