Keystones — Lintel
Five GCSE retrieval questions · 11 March 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 90,000,000 in standard form
Answer: 9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 40
Answer: (x + 5)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 34°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.07cm -
4. Ratio Mixed ratio problems
Simplify the ratio £4 : 55p
Answer: 80:11 -
5. Statistics Mean
Calculate the mean of: 12, 47, 9, 37, 27, 7, 27, 50
Answer: 27