Keystones — Lintel
Five GCSE retrieval questions · 2 December 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000056 in standard form
Answer: 5.6 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 28
Answer: (x + 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 53°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.04cm -
4. Ratio Mixed ratio problems
£384.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £240.00 -
5. Statistics Mean
Calculate the mean of: 11, 38, 48, 25, 15, 43, 48, 22
Answer: 31.25