Keystones — Lintel
Five GCSE retrieval questions · 7 December 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.043 in standard form
Answer: 4.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 60
Answer: (x + 10)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 46°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.62cm -
4. Ratio Mixed ratio problems
Divide 270 in the ratio 4:1:4
Answer: 120, 30 and 120 -
5. Statistics Mean
Calculate the mean of: 20, 15, 27, 49, 20, 44, 10. Give your answer to 2 decimal places
Answer: 26.43