Keystones — Lintel
Five GCSE retrieval questions · 11 April 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 550,000 in standard form
Answer: 5.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 90
Answer: (x + 9)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 36°. Find opposite. Give your answer to 2 decimal places
Answer: 21.8cm -
4. Ratio Mixed ratio problems
Simplify: 15:6:12
Answer: 5:2:4 -
5. Statistics Mean
Calculate the mean of: 20, 50, 23, 26, 8, 14, 27
Answer: 24