Keystones — Lintel
Five GCSE retrieval questions · 15 June 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 550,000 in standard form
Answer: 5.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 40
Answer: (x + 5)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.73cm -
4. Ratio Mixed ratio problems
Divide 136 in the ratio 2:3:3
Answer: 34, 51 and 51 -
5. Statistics Mean
Calculate the mean of: 11, 50, 47, 11, 48, 20, 5, 31. Give your answer to 2 decimal places
Answer: 27.88