Keystones — Lintel
Five GCSE retrieval questions · 16 September 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0006 in standard form
Answer: 6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 24
Answer: (x + 3)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 59°. Find opposite. Give your answer to 2 decimal places
Answer: 36.61cm -
4. Ratio Mixed ratio problems
Orange and purple sweets are in the ratio 5:6. What fraction of the sweets are orange?
Answer: 5⁄11 -
5. Statistics Mean
Calculate the mean of: 31, 25, 15, 18, 6, 16, 12, 49
Answer: 21.5