Keystones — Lintel
Five GCSE retrieval questions · 20 April 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.054 in standard form
Answer: 5.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 12x + 20
Answer: (x + 10)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 51°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.36cm -
4. Ratio Mixed ratio problems
In ratio 7:3:2, what fraction is the third part?
Answer: 1⁄6 -
5. Statistics Mean
Calculate the mean of: 6, 29, 30, 16, 5, 15, 28, 39
Answer: 21