Keystones — Lintel
Five GCSE retrieval questions · 15 July 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 2,100,000 in standard form
Answer: 2.1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 108
Answer: (x + 9)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.46cm -
4. Ratio Mixed ratio problems
£174.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £116.00 -
5. Statistics Mean
Calculate the mean of: 14, 42, 48, 21, 45, 30, 23. Give your answer to 2 decimal places
Answer: 31.86