Keystones — Lintel
Five GCSE retrieval questions · 28 November 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 920,000 in standard form
Answer: 9.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 9x - 10
Answer: (x + 10)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 52°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.09cm -
4. Ratio Mixed ratio problems
Express the first part of 2:8 as a fraction in simplest form
Answer: 1⁄5 -
5. Statistics Mean
Calculate the mean of: 12, 23, 48, 27, 33, 42, 45. Give your answer to 2 decimal places
Answer: 32.86