Keystones — Lintel
Five GCSE retrieval questions · 31 December 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0037 in standard form
Answer: 3.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 54
Answer: (x + 6)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 54°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.11cm -
4. Ratio Mixed ratio problems
Simplify the ratio £2 : 70p
Answer: 20:7 -
5. Statistics Mean
Calculate the mean of: 27, 36, 42, 12, 16, 22, 28. Give your answer to 2 decimal places
Answer: 26.14