Keystones — Lintel
Five GCSE retrieval questions · 1 October 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0055 in standard form
Answer: 5.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 80
Answer: (x + 10)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 25°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.22cm -
4. Ratio Mixed ratio problems
£282.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £188.00 -
5. Statistics Mean
Calculate the mean of: 15, 20, 6, 32, 5, 6
Answer: 14