Keystones — Lintel
Five GCSE retrieval questions · 3 November 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 280,000 in standard form
Answer: 2.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 40
Answer: (x + 5)(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
Simplify the ratio 6kg : 300g
Answer: 20:1 -
5. Statistics Mean
Calculate the mean of: 25, 48, 5, 46, 6, 11, 14. Give your answer to 2 decimal places
Answer: 22.14