Keystones — Lintel
Five GCSE retrieval questions · 12 January 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 8,600,000 in standard form
Answer: 8.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 29°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.99cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3m : 30cm
Answer: 10:1 -
5. Statistics Mean
Calculate the mean of: 37, 36, 20, 31, 12, 36, 24, 20
Answer: 27