Keystones — Lintel
Five GCSE retrieval questions · 5 April 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0023 in standard form
Answer: 2.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 21.cm -
4. Ratio Mixed ratio problems
Simplify the ratio £3 : 10p
Answer: 30:1 -
5. Statistics Mean
Calculate the mean of: 11, 44, 18, 26, 50, 45, 35, 18. Give your answer to 2 decimal places
Answer: 30.88