Keystones — Lintel
Five GCSE retrieval questions · 4 November 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.031 in standard form
Answer: 3.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 16x + 63
Answer: (x + 9)(x + 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 33°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.29cm -
4. Ratio Mixed ratio problems
Simplify the ratio 1 hour : 55 minutes
Answer: 12:11 -
5. Statistics Mean
Calculate the mean of: 12, 18, 22, 17, 42, 49. Give your answer to 2 decimal places
Answer: 26.67