Keystones — Lintel
Five GCSE retrieval questions · 27 February 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0089 in standard form
Answer: 8.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 90
Answer: (x + 10)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 41°. Find adjacent side. Give your answer to 2 decimal places
Answer: 29.43cm -
4. Ratio Mixed ratio problems
£192.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £72.00 -
5. Statistics Mean
Calculate the mean of: 19, 19, 31, 36, 49, 46, 50, 26
Answer: 34.5