Keystones — Lintel
Five GCSE retrieval questions · 11 May 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 55,000,000 in standard form
Answer: 5.5 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 10
Answer: (x + 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 32°. Find opposite. Give your answer to 2 decimal places
Answer: 6.87cm -
4. Ratio Mixed ratio problems
In ratio 12:5:5, what fraction is the second part?
Answer: 5⁄22 -
5. Statistics Mean
Calculate the mean of: 7, 47, 45, 42, 45, 29. Give your answer to 2 decimal places
Answer: 35.83