Keystones — Lintel
Five GCSE retrieval questions · 3 January 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00091 in standard form
Answer: 9.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 42
Answer: (x + 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 39°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.43cm -
4. Ratio Mixed ratio problems
£384.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £240.00 -
5. Statistics Mean
Calculate the mean of: 46, 34, 13, 21, 7, 18. Give your answer to 2 decimal places
Answer: 23.17