Keystones — Lintel
Five GCSE retrieval questions · 28 April 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 990,000,000 in standard form
Answer: 9.9 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 60
Answer: (x + 6)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 50°. Find opposite. Give your answer to 2 decimal places
Answer: 23.84cm -
4. Ratio Mixed ratio problems
£280.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £160.00 -
5. Statistics Mean
Calculate the mean of: 12, 21, 49, 37, 29, 45, 35, 44
Answer: 34