Keystones — Lintel
Five GCSE retrieval questions · 16 December 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000048 in standard form
Answer: 4.8 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 55°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.05cm -
4. Ratio Mixed ratio problems
Simplify: 15:9:9
Answer: 5:3:3 -
5. Statistics Mean
Calculate the mean of: 45, 36, 38, 47, 6, 33. Give your answer to 2 decimal places
Answer: 34.17