Keystones — Lintel
Five GCSE retrieval questions · 17 May 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 740,000,000 in standard form
Answer: 7.4 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 47°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.28cm -
4. Ratio Mixed ratio problems
Divide 200 in the ratio 4:1:3
Answer: 100, 25 and 75 -
5. Statistics Mean
Calculate the mean of: 29, 24, 49, 17, 20, 27, 26. Give your answer to 2 decimal places
Answer: 27.43