Keystones — Lintel
Five GCSE retrieval questions · 29 November 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0086 in standard form
Answer: 8.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x - 8
Answer: (x + 1)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 53°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.25cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3kg : 950g
Answer: 60:19 -
5. Statistics Mean
Calculate the mean of: 42, 8, 9, 11, 5, 35, 38, 10
Answer: 19.75