Keystones — Lintel
Five GCSE retrieval questions · 1 March 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 880,000 in standard form
Answer: 8.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 30
Answer: (x + 10)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 35°. Find adjacent side. Give your answer to 2 decimal places
Answer: 20.48cm -
4. Ratio Mixed ratio problems
Divide 136 in the ratio 1:3:4
Answer: 17, 51 and 68 -
5. Statistics Mean
Calculate the mean of: 13, 11, 36, 13, 26, 23, 26. Give your answer to 2 decimal places
Answer: 21.14