Keystones — Lintel
Five GCSE retrieval questions · 6 January 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.058 in standard form
Answer: 5.8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 27°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.93cm -
4. Ratio Mixed ratio problems
Express the first part of 8:13 as a fraction in simplest form
Answer: 8⁄21 -
5. Statistics Mean
Calculate the mean of: 47, 44, 39, 49, 38, 30, 6. Give your answer to 2 decimal places
Answer: 36.14