Keystones — Lintel
Five GCSE retrieval questions · 29 May 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0045 in standard form
Answer: 4.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x - 8
Answer: (x + 1)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 35°. Find opposite. Give your answer to 2 decimal places
Answer: 14.7cm -
4. Ratio Mixed ratio problems
£110.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £66.00 -
5. Statistics Mean
Calculate the mean of: 16, 34, 22, 43, 16, 13, 27, 39
Answer: 26.25