Keystones — Lintel
Five GCSE retrieval questions · 15 March 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000014 in standard form
Answer: 1.4 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 34°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.26cm -
4. Ratio Mixed ratio problems
In ratio 3:9:5, what fraction is the first part?
Answer: 3⁄17 -
5. Statistics Mean
Calculate the mean of: 28, 31, 40, 6, 42, 49. Give your answer to 2 decimal places
Answer: 32.67