Keystones — Lintel
Five GCSE retrieval questions · 27 April 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 34,000 in standard form
Answer: 3.4 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 63
Answer: (x + 7)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 36°. Find opposite. Give your answer to 2 decimal places
Answer: 16.71cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5 hours : 5 minutes
Answer: 60:1 -
5. Statistics Mean
Calculate the mean of: 27, 15, 32, 32, 8, 19. Give your answer to 2 decimal places
Answer: 22.17