Keystones — Lintel
Five GCSE retrieval questions · 6 December 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 530,000,000 in standard form
Answer: 5.3 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 24
Answer: (x + 8)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 35°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.84cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2 hours : 20 minutes
Answer: 6:1 -
5. Statistics Mean
Calculate the mean of: 5, 13, 9, 18, 48, 7, 47
Answer: 21