Keystones — Lintel
Five GCSE retrieval questions · 26 February 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0029 in standard form
Answer: 2.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 7
Answer: (x - 1)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places
Answer: 21.94cm -
4. Ratio Mixed ratio problems
Simplify: 6:9:6
Answer: 2:3:2 -
5. Statistics Mean
Calculate the mean of: 16, 40, 48, 20, 11, 19, 47. Give your answer to 2 decimal places
Answer: 28.71