Keystones — Lintel
Five GCSE retrieval questions · 23 February 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.015 in standard form
Answer: 1.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 36
Answer: (x + 9)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 41°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.08cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3 hours : 50 minutes
Answer: 18:5 -
5. Statistics Mean
Calculate the mean of: 28, 40, 30, 36, 33, 45. Give your answer to 2 decimal places
Answer: 35.33