Keystones — Lintel
Five GCSE retrieval questions · 9 August 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.083 in standard form
Answer: 8.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 6
Answer: (x + 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 41°. Find opposite. Give your answer to 2 decimal places
Answer: 16.52cm -
4. Ratio Mixed ratio problems
Divide 126 in the ratio 2:3:4
Answer: 28, 42 and 56 -
5. Statistics Mean
Calculate the mean of: 20, 22, 24, 34, 24, 50
Answer: 29