Keystones — Lintel
Five GCSE retrieval questions · 3 February 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 4,400,000 in standard form
Answer: 4.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 108
Answer: (x + 12)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 49°. Find opposite. Give your answer to 2 decimal places
Answer: 27.61cm -
4. Ratio Mixed ratio problems
Divide 160 in the ratio 4:3:1
Answer: 80, 60 and 20 -
5. Statistics Mean
Calculate the mean of: 40, 44, 36, 43, 35, 26. Give your answer to 2 decimal places
Answer: 37.33