Keystones — Lintel
Five GCSE retrieval questions · 18 February 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 3,000,000 in standard form
Answer: 3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 11
Answer: (x - 1)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 52°. Find opposite. Give your answer to 2 decimal places
Answer: 24.32cm -
4. Ratio Mixed ratio problems
Black, white and yellow beads are in the ratio 12:6:2. What fraction of the beads are black?
Answer: 3⁄5 -
5. Statistics Mean
Calculate the mean of: 42, 48, 28, 10, 11, 25, 42, 42
Answer: 31