Keystones — Lintel
Five GCSE retrieval questions · 3 September 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 110,000,000 in standard form
Answer: 1.1 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 39°. Find opposite. Give your answer to 2 decimal places
Answer: 13.77cm -
4. Ratio Mixed ratio problems
Divide 154 in the ratio 4:3:4
Answer: 56, 42 and 56 -
5. Statistics Mean
Calculate the mean of: 46, 19, 45, 8, 30, 5
Answer: 25.5