Keystones — Lintel
Five GCSE retrieval questions · 22 May 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 680,000,000 in standard form
Answer: 6.8 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 48
Answer: (x + 6)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 51°. Find opposite. Give your answer to 2 decimal places
Answer: 13.58cm -
4. Ratio Mixed ratio problems
In ratio 6:6:8, what fraction is the third part?
Answer: 2⁄5 -
5. Statistics Mean
Calculate the mean of: 11, 44, 6, 26, 12, 42, 6
Answer: 21