Keystones — Lintel
Five GCSE retrieval questions · 26 November 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 12,000 in standard form
Answer: 1.2 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 90
Answer: (x + 9)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 57°. Find adjacent side. Give your answer to 2 decimal places
Answer: 8.71cm -
4. Ratio Mixed ratio problems
£235.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £141.00 -
5. Statistics Mean
Calculate the mean of: 26, 28, 20, 42, 39, 36, 40
Answer: 33