Keystones — Lintel
Five GCSE retrieval questions · 13 February 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 2,800,000 in standard form
Answer: 2.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 42
Answer: (x + 6)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 33°. Find opposite. Give your answer to 2 decimal places
Answer: 14.29cm -
4. Ratio Mixed ratio problems
£100.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £60.00 -
5. Statistics Mean
Calculate the mean of: 33, 28, 19, 12, 25, 30, 35
Answer: 26