Keystones — Lintel
Five GCSE retrieval questions · 23 November 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.052 in standard form
Answer: 5.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 63
Answer: (x + 7)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 65°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.26cm -
4. Ratio Mixed ratio problems
Divide 168 in the ratio 1:4:3
Answer: 21, 84 and 63 -
5. Statistics Mean
Calculate the mean of: 42, 5, 44, 7, 18, 50. Give your answer to 2 decimal places
Answer: 27.67