Keystones — Lintel
Five GCSE retrieval questions · 20 August 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 820,000 in standard form
Answer: 8.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 16.31cm -
4. Ratio Mixed ratio problems
Divide 168 in the ratio 3:4:1
Answer: 63, 84 and 21 -
5. Statistics Mean
Calculate the mean of: 39, 46, 26, 25, 26, 41, 40. Give your answer to 2 decimal places
Answer: 34.71