Keystones — Lintel
Five GCSE retrieval questions · 9 June 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.014 in standard form
Answer: 1.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 42
Answer: (x + 6)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 55°. Find opposite. Give your answer to 2 decimal places
Answer: 37.13cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4 litres : 300 ml
Answer: 40:3 -
5. Statistics Mean
Calculate the mean of: 46, 44, 29, 47, 17, 42, 28, 25
Answer: 34.75