Keystones — Lintel
Five GCSE retrieval questions · 1 June 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000051 in standard form
Answer: 5.1 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 3
Answer: (x + 1)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 29°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.62cm -
4. Ratio Mixed ratio problems
Simplify the ratio £1 : 55p
Answer: 20:11 -
5. Statistics Mean
Calculate the mean of: 16, 7, 5, 46, 32, 44, 25
Answer: 25