Keystones — Lintel
Five GCSE retrieval questions · 30 June 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000088 in standard form
Answer: 8.8 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 7
Answer: (x + 1)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 59°. Find opposite. Give your answer to 2 decimal places
Answer: 33.29cm -
4. Ratio Mixed ratio problems
Red and blue sweets are in the ratio 14:7. What fraction of the sweets are blue?
Answer: 1⁄3 -
5. Statistics Mean
Calculate the mean of: 39, 50, 50, 34, 7, 25. Give your answer to 2 decimal places
Answer: 34.17