Keystones — Lintel
Five GCSE retrieval questions · 11 July 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 620,000,000 in standard form
Answer: 6.2 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 40
Answer: (x + 8)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.13cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4 hours : 10 minutes
Answer: 24:1 -
5. Statistics Mean
Calculate the mean of: 18, 5, 20, 25, 24, 36, 47, 50. Give your answer to 2 decimal places
Answer: 28.13