Keystones — Lintel
Five GCSE retrieval questions · 8 May 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.07 in standard form
Answer: 7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 9x + 14
Answer: (x + 7)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 50°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.57cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5 hours : 20 minutes
Answer: 15:1 -
5. Statistics Mean
Calculate the mean of: 45, 9, 13, 48, 9, 8, 48. Give your answer to 2 decimal places
Answer: 25.71