Keystones — Lintel
Five GCSE retrieval questions · 16 January 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 120,000 in standard form
Answer: 1.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 45
Answer: (x + 9)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 37°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.76cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5 hours : 25 minutes
Answer: 12:1 -
5. Statistics Mean
Calculate the mean of: 43, 24, 18, 29, 37, 11, 7, 45
Answer: 26.75