Keystones — Lintel
Five GCSE retrieval questions · 16 May 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 430,000,000 in standard form
Answer: 4.3 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.11cm -
4. Ratio Mixed ratio problems
In ratio 2:6:2, what fraction is the second part?
Answer: 3⁄5 -
5. Statistics Mean
Calculate the mean of: 45, 24, 22, 12, 7, 9, 10, 13
Answer: 17.75