Keystones — Lintel
Five GCSE retrieval questions · 19 October 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 940,000 in standard form
Answer: 9.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x + 10
Answer: (x + 5)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.97cm -
4. Ratio Mixed ratio problems
In ratio 3:11:5, what fraction is the first part?
Answer: 3⁄19 -
5. Statistics Mean
The mean of 5 numbers is 30. If 4 of them are 34, 27, 22, 31, what is the missing number?
Answer: 36