Keystones — Lintel
Five GCSE retrieval questions · 4 April 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 5,500,000 in standard form
Answer: 5.5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 42.99cm -
4. Ratio Mixed ratio problems
Divide 108 in the ratio 3:2:4
Answer: 36, 24 and 48 -
5. Statistics Mean
Calculate the mean of: 16, 39, 38, 36, 21, 8. Give your answer to 2 decimal places
Answer: 26.33