Keystones — Lintel
Five GCSE retrieval questions · 15 September 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 7,800,000 in standard form
Answer: 7.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 55°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.47cm -
4. Ratio Mixed ratio problems
Divide 182 in the ratio 1:2:4
Answer: 26, 52 and 104 -
5. Statistics Mean
Calculate the mean of: 24, 13, 25, 41, 30, 26, 22. Give your answer to 2 decimal places
Answer: 25.86