Keystones — Lintel
Five GCSE retrieval questions · 22 May 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0043 in standard form
Answer: 4.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 53°. Find opposite. Give your answer to 2 decimal places
Answer: 37.16cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4kg : 50g
Answer: 80:1 -
5. Statistics Mean
Calculate the mean of: 20, 29, 32, 35, 50, 34. Give your answer to 2 decimal places
Answer: 33.33