Keystones — Lintel
Five GCSE retrieval questions · 10 November 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000085 in standard form
Answer: 8.5 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 10x - 11
Answer: (x + 11)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 28°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.24cm -
4. Ratio Mixed ratio problems
Divide 132 in the ratio 4:4:3
Answer: 48, 48 and 36 -
5. Statistics Mean
Calculate the mean of: 40, 18, 11, 11, 25, 39, 47. Give your answer to 2 decimal places
Answer: 27.29