Keystones — Lintel
Five GCSE retrieval questions · 27 July 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0058 in standard form
Answer: 5.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 16x + 48
Answer: (x + 12)(x + 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 49°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.37cm -
4. Ratio Mixed ratio problems
Divide 80 in the ratio 1:4:3
Answer: 10, 40 and 30 -
5. Statistics Mean
Calculate the mean of: 50, 17, 20, 34, 23, 19, 34, 24. Give your answer to 2 decimal places
Answer: 27.63