Keystones — Lintel
Five GCSE retrieval questions · 13 September 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 600,000 in standard form
Answer: 6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 24
Answer: (x + 4)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 39°. Find opposite. Give your answer to 2 decimal places
Answer: 13.77cm -
4. Ratio Mixed ratio problems
In ratio 4:6:8, what fraction is the third part?
Answer: 4⁄9 -
5. Statistics Mean
Calculate the mean of: 28, 38, 8, 34, 25, 24. Give your answer to 2 decimal places
Answer: 26.17