Keystones — Lintel
Five GCSE retrieval questions · 12 April 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 29,000 in standard form
Answer: 2.9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 14x + 40
Answer: (x + 10)(x + 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 60°. Find adjacent side
Answer: 12cm -
4. Ratio Mixed ratio problems
Divide 160 in the ratio 3:3:4
Answer: 48, 48 and 64 -
5. Statistics Mean
Calculate the mean of: 28, 35, 33, 7, 14, 40. Give your answer to 2 decimal places
Answer: 26.17