Keystones — Lintel
Five GCSE retrieval questions · 3 March 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0006 in standard form
Answer: 6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 132
Answer: (x + 12)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 30°. Find opposite. Give your answer to 2 decimal places
Answer: 13.28cm -
4. Ratio Mixed ratio problems
In ratio 5:3:9, what fraction is the third part?
Answer: 9⁄17 -
5. Statistics Mean
Calculate the mean of: 44, 23, 44, 47, 6, 46, 15, 16. Give your answer to 2 decimal places
Answer: 30.13