Keystones — Lintel
Five GCSE retrieval questions · 30 March 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00006 in standard form
Answer: 6 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 12
Answer: (x + 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 31.13cm -
4. Ratio Mixed ratio problems
Red, blue and green beads are in the ratio 2:10:3. What fraction of the beads are blue?
Answer: 2⁄3 -
5. Statistics Mean
Calculate the mean of: 15, 35, 33, 45, 27, 14, 24, 15
Answer: 26