Keystones — Lintel
Five GCSE retrieval questions · 17 June 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00026 in standard form
Answer: 2.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 7
Answer: (x + 1)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 30°. Find opposite. Give your answer to 2 decimal places
Answer: 12.7cm -
4. Ratio Mixed ratio problems
£186.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £62.00 -
5. Statistics Mean
Calculate the mean of: 6, 9, 41, 6, 8, 42, 38. Give your answer to 2 decimal places
Answer: 21.43