Keystones — Lintel
Five GCSE retrieval questions · 5 August 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.066 in standard form
Answer: 6.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 54
Answer: (x + 9)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.9cm -
4. Ratio Mixed ratio problems
Red and blue marbles are in the ratio 9:3. What fraction of the marbles are blue?
Answer: 1⁄4 -
5. Statistics Mean
Calculate the mean of: 44, 35, 32, 37, 42, 47, 19, 21. Give your answer to 2 decimal places
Answer: 34.63