Keystones — Lintel
Five GCSE retrieval questions · 10 February 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0008 in standard form
Answer: 8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x + 7
Answer: (x + 7)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 46°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.09cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2kg : 100g
Answer: 20:1 -
5. Statistics Mean
Calculate the mean of: 26, 19, 25, 14, 36, 6, 27. Give your answer to 2 decimal places
Answer: 21.86