Keystones — Lintel
Five GCSE retrieval questions · 28 November 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 2,400,000 in standard form
Answer: 2.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 40
Answer: (x + 10)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 35°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.29cm -
4. Ratio Mixed ratio problems
Divide 120 in the ratio 2:3:1
Answer: 40, 60 and 20 -
5. Statistics Mean
Calculate the mean of: 49, 6, 7, 45, 26, 32
Answer: 27.5