Keystones — Lintel
Five GCSE retrieval questions · 16 June 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 5,100,000 in standard form
Answer: 5.1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 43°. Find opposite. Give your answer to 2 decimal places
Answer: 20.52cm -
4. Ratio Mixed ratio problems
Divide 78 in the ratio 3:1:2
Answer: 39, 13 and 26 -
5. Statistics Mean
Calculate the mean of: 30, 43, 13, 29, 31, 5, 29. Give your answer to 2 decimal places
Answer: 25.71