Keystones — Lintel
Five GCSE retrieval questions · 5 April 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 16,000 in standard form
Answer: 1.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 27
Answer: (x - 3)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 52°. Find opposite. Give your answer to 2 decimal places
Answer: 29.44cm -
4. Ratio Mixed ratio problems
Orange, purple and pink counters are in the ratio 3:1:6. What fraction of the counters are pink?
Answer: 3⁄5 -
5. Statistics Mean
Calculate the mean of: 18, 50, 12, 14, 9, 27, 13, 11
Answer: 19.25