Keystones — Lintel
Five GCSE retrieval questions · 3 January 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 180,000,000 in standard form
Answer: 1.8 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 56
Answer: (x + 7)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.63cm -
4. Ratio Mixed ratio problems
Simplify the ratio 1 hour : 45 minutes
Answer: 4:3 -
5. Statistics Mean
Calculate the mean of: 23, 9, 40, 45, 34, 24, 36, 7
Answer: 27.25