Keystones — Lintel
Five GCSE retrieval questions · 18 June 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0045 in standard form
Answer: 4.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 120
Answer: (x + 10)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 55°. Find opposite. Give your answer to 2 decimal places
Answer: 39.99cm -
4. Ratio Mixed ratio problems
£125.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £50.00 -
5. Statistics Mean
Calculate the mean of: 32, 5, 38, 28, 10, 14, 31. Give your answer to 2 decimal places
Answer: 22.57