Keystones — Lintel
Five GCSE retrieval questions · 29 August 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 840,000 in standard form
Answer: 8.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 18
Answer: (x + 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 46°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.23cm -
4. Ratio Mixed ratio problems
In ratio 6:11:6, what fraction is the first part?
Answer: 6⁄23 -
5. Statistics Mean
Calculate the mean of: 17, 41, 33, 12, 43, 22, 23. Give your answer to 2 decimal places
Answer: 27.29