Keystones — Lintel
Five GCSE retrieval questions · 23 August 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000086 in standard form
Answer: 8.6 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 15x + 56
Answer: (x - 7)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 57°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.16cm -
4. Ratio Mixed ratio problems
Divide 60 in the ratio 1:1:4
Answer: 10, 10 and 40 -
5. Statistics Mean
Calculate the mean of: 18, 50, 30, 26, 42, 10, 32, 45. Give your answer to 2 decimal places
Answer: 31.63