Keystones — Lintel
Five GCSE retrieval questions · 19 December 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0071 in standard form
Answer: 7.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.09cm -
4. Ratio Mixed ratio problems
Black and white sweets are in the ratio 5:15. What fraction of the sweets are white?
Answer: 3⁄4 -
5. Statistics Mean
Calculate the mean of: 45, 16, 36, 16, 47, 11
Answer: 28.5