Keystones — Lintel
Five GCSE retrieval questions · 22 July 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.074 in standard form
Answer: 7.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 30
Answer: (x + 10)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 56°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.74cm -
4. Ratio Mixed ratio problems
£105.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £42.00 -
5. Statistics Mean
Calculate the mean of: 43, 47, 47, 40, 32, 6, 9
Answer: 32