Keystones — Lintel
Five GCSE retrieval questions · 24 May 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 57,000,000 in standard form
Answer: 5.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x + 6
Answer: (x + 6)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 52°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.93cm -
4. Ratio Mixed ratio problems
Divide 75 in the ratio 1:2:2
Answer: 15, 30 and 30 -
5. Statistics Mean
Calculate the mean of: 36, 18, 49, 22, 29, 38, 32
Answer: 32