Keystones — Lintel
Five GCSE retrieval questions · 9 July 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0006 in standard form
Answer: 6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 10x + 24
Answer: (x + 6)(x + 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 26.15cm -
4. Ratio Mixed ratio problems
Divide 170 in the ratio 2:1:2
Answer: 68, 34 and 68 -
5. Statistics Mean
Calculate the mean of: 36, 20, 15, 40, 40, 38, 48, 13
Answer: 31.25