Keystones — Lintel
Five GCSE retrieval questions · 13 January 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 64,000,000 in standard form
Answer: 6.4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 56
Answer: (x + 8)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 55°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.35cm -
4. Ratio Mixed ratio problems
Simplify: 12:18:6
Answer: 2:3:1 -
5. Statistics Mean
Calculate the mean of: 49, 31, 15, 44, 43, 37
Answer: 36.5