Keystones — Lintel
Five GCSE retrieval questions · 22 November 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 120,000 in standard form
Answer: 1.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 42
Answer: (x + 6)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 62°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.84cm -
4. Ratio Mixed ratio problems
Simplify the ratio £9 : 60p
Answer: 15:1 -
5. Statistics Mean
Calculate the mean of: 43, 7, 10, 5, 23, 40, 16. Give your answer to 2 decimal places
Answer: 20.57