Keystones — Lintel
Five GCSE retrieval questions · 20 April 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 940,000,000 in standard form
Answer: 9.4 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 9x - 36
Answer: (x + 12)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 25°. Find adjacent side. Give your answer to 2 decimal places
Answer: 30.81cm -
4. Ratio Mixed ratio problems
In ratio 7:10:9, what fraction is the first part?
Answer: 7⁄26 -
5. Statistics Mean
Calculate the mean of: 17, 12, 43, 26, 39, 25, 23. Give your answer to 2 decimal places
Answer: 26.43