Keystones — Lintel
Five GCSE retrieval questions · 15 January 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 290,000 in standard form
Answer: 2.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 14
Answer: (x + 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 39°. Find opposite. Give your answer to 2 decimal places
Answer: 16.2cm -
4. Ratio Mixed ratio problems
£217.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £93.00 -
5. Statistics Mean
Calculate the mean of: 18, 24, 10, 49, 33, 23, 39
Answer: 28