Keystones — Lintel
Five GCSE retrieval questions · 22 May 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 9,300,000 in standard form
Answer: 9.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 24
Answer: (x - 3)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 47°. Find opposite. Give your answer to 2 decimal places
Answer: 24.66cm -
4. Ratio Mixed ratio problems
In ratio 7:5:10, what fraction is the first part?
Answer: 7⁄22 -
5. Statistics Mean
Calculate the mean of: 24, 48, 23, 14, 9, 10, 17. Give your answer to 2 decimal places
Answer: 20.71