Keystones — Lintel
Five GCSE retrieval questions · 23 July 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.036 in standard form
Answer: 3.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 63
Answer: (x + 9)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 29°. Find adjacent side. Give your answer to 2 decimal places
Answer: 30.61cm -
4. Ratio Mixed ratio problems
Divide 90 in the ratio 4:3:2
Answer: 40, 30 and 20 -
5. Statistics Mean
Calculate the mean of: 43, 43, 30, 8, 35, 24, 44, 21
Answer: 31