Keystones — Lintel
Five GCSE retrieval questions · 26 February 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000084 in standard form
Answer: 8.4 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 16
Answer: (x + 2)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 30°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.78cm -
4. Ratio Mixed ratio problems
Divide 84 in the ratio 1:2:4
Answer: 12, 24 and 48 -
5. Statistics Mean
Calculate the mean of: 44, 19, 14, 26, 11, 8, 29. Give your answer to 2 decimal places
Answer: 21.57