Keystones — Lintel
Five GCSE retrieval questions · 12 June 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 7,600,000 in standard form
Answer: 7.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 8
Answer: (x + 2)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 49°. Find opposite. Give your answer to 2 decimal places
Answer: 16.11cm -
4. Ratio Mixed ratio problems
Simplify: 12:24:24
Answer: 1:2:2 -
5. Statistics Mean
Calculate the mean of: 5, 17, 46, 29, 9, 23, 41, 43. Give your answer to 2 decimal places
Answer: 26.63