Keystones — Lintel
Five GCSE retrieval questions · 17 March 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 430,000 in standard form
Answer: 4.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 7
Answer: (x + 1)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 14.44cm -
4. Ratio Mixed ratio problems
Divide 184 in the ratio 2:1:1
Answer: 92, 46 and 46 -
5. Statistics Mean
Calculate the mean of: 38, 20, 46, 25, 10, 43, 39. Give your answer to 2 decimal places
Answer: 31.57