Keystones — Lintel
Five GCSE retrieval questions · 4 March 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 87,000,000 in standard form
Answer: 8.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 14
Answer: (x + 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 48°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.05cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4 litres : 150 ml
Answer: 80:3 -
5. Statistics Mean
Calculate the mean of: 33, 5, 42, 35, 30, 18, 10, 47
Answer: 27.5