Keystones — Lintel
Five GCSE retrieval questions · 15 June 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00061 in standard form
Answer: 6.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 26°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.77cm -
4. Ratio Mixed ratio problems
Divide 104 in the ratio 1:1:2
Answer: 26, 26 and 52 -
5. Statistics Mean
Calculate the mean of: 41, 26, 32, 41, 14, 9. Give your answer to 2 decimal places
Answer: 27.17