Keystones — Lintel
Five GCSE retrieval questions · 31 January 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 180,000,000 in standard form
Answer: 1.8 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 42
Answer: (x + 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 64°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.27cm -
4. Ratio Mixed ratio problems
Simplify: 15:9:15
Answer: 5:3:5 -
5. Statistics Mean
Calculate the mean of: 24, 29, 19, 8, 38, 37, 48, 11
Answer: 26.75