Keystones — Lintel
Five GCSE retrieval questions · 15 November 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 520,000 in standard form
Answer: 5.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 9x - 10
Answer: (x + 10)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 42°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.84cm -
4. Ratio Mixed ratio problems
In ratio 12:3:8, what fraction is the first part?
Answer: 12⁄23 -
5. Statistics Mean
Calculate the mean of: 43, 19, 28, 22, 29, 47, 47, 12. Give your answer to 2 decimal places
Answer: 30.88