Keystones — Lintel
Five GCSE retrieval questions · 4 August 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.099 in standard form
Answer: 9.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 21x + 110
Answer: (x - 10)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 41°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.17cm -
4. Ratio Mixed ratio problems
In ratio 12:8:12, what fraction is the second part?
Answer: 1⁄4 -
5. Statistics Mean
Calculate the mean of: 8, 34, 14, 10, 44, 25, 19
Answer: 22