Keystones — Lintel
Five GCSE retrieval questions · 28 March 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00062 in standard form
Answer: 6.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 17x + 70
Answer: (x + 10)(x + 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 25°. Find adjacent side. Give your answer to 2 decimal places
Answer: 29.91cm -
4. Ratio Mixed ratio problems
Divide 203 in the ratio 3:3:1
Answer: 87, 87 and 29 -
5. Statistics Mean
Calculate the mean of: 41, 38, 39, 9, 16, 8. Give your answer to 2 decimal places
Answer: 25.17