Keystones — Lintel
Five GCSE retrieval questions · 3 February 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.059 in standard form
Answer: 5.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 35
Answer: (x + 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 42°. Find opposite. Give your answer to 2 decimal places
Answer: 9.9cm -
4. Ratio Mixed ratio problems
Divide 99 in the ratio 4:4:1
Answer: 44, 44 and 11 -
5. Statistics Mean
Calculate the mean of: 38, 19, 14, 21, 9, 48, 40, 24. Give your answer to 2 decimal places
Answer: 26.63