Keystones — Lintel
Five GCSE retrieval questions · 21 January 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 11,000 in standard form
Answer: 1.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x - 9
Answer: (x + 1)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 28°. Find adjacent side. Give your answer to 2 decimal places
Answer: 26.49cm -
4. Ratio Mixed ratio problems
Black, white and yellow sweets are in the ratio 11:12:8. What fraction of the sweets are black?
Answer: 11⁄31 -
5. Statistics Mean
Calculate the mean of: 36, 33, 45, 43, 48, 19, 36, 6
Answer: 33.25