Keystones — Lintel
Five GCSE retrieval questions · 14 July 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 6,300,000 in standard form
Answer: 6.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x + 7
Answer: (x + 7)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 25°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.03cm -
4. Ratio Mixed ratio problems
Divide 116 in the ratio 1:1:2
Answer: 29, 29 and 58 -
5. Statistics Mean
Calculate the mean of: 17, 40, 24, 7, 44, 50. Give your answer to 2 decimal places
Answer: 30.33