Keystones — Lintel
Five GCSE retrieval questions · 11 November 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000041 in standard form
Answer: 4.1 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 60
Answer: (x + 6)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 49°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.47cm -
4. Ratio Mixed ratio problems
£396.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £220.00 -
5. Statistics Mean
Calculate the mean of: 42, 28, 41, 46, 42, 46. Give your answer to 2 decimal places
Answer: 40.83