Keystones — Lintel
Five GCSE retrieval questions · 5 October 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 3,000,000 in standard form
Answer: 3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 64°. Find adjacent side. Give your answer to 2 decimal places
Answer: 8.77cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5 litres : 350 ml
Answer: 100:7 -
5. Statistics Mean
Calculate the mean of: 45, 34, 36, 15, 16, 43
Answer: 31.5