Keystones — Lintel
Five GCSE retrieval questions · 1 February 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 450,000 in standard form
Answer: 4.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 56
Answer: (x + 8)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 25°. Find adjacent side. Give your answer to 2 decimal places
Answer: 30.81cm -
4. Ratio Mixed ratio problems
Simplify the ratio 1 litre : 550 ml
Answer: 20:11 -
5. Statistics Mean
Calculate the mean of: 40, 41, 11, 35, 32, 48, 31
Answer: 34