Keystones — Lintel
Five GCSE retrieval questions · 26 April 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0005 in standard form
Answer: 5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 10
Answer: (x - 1)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 47°. Find opposite. Give your answer to 2 decimal places
Answer: 16.09cm -
4. Ratio Mixed ratio problems
Simplify: 16:24:20
Answer: 4:6:5 -
5. Statistics Mean
Calculate the mean of: 46, 33, 32, 36, 23, 30, 38
Answer: 34