Keystones — Lintel
Five GCSE retrieval questions · 17 October 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 280,000,000 in standard form
Answer: 2.8 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 15x + 50
Answer: (x - 5)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 43°. Find opposite. Give your answer to 2 decimal places
Answer: 10.26cm -
4. Ratio Mixed ratio problems
£182.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £130.00 -
5. Statistics Mean
Calculate the mean of: 23, 38, 9, 47, 6, 11, 9. Give your answer to 2 decimal places
Answer: 20.43