Keystones — Lintel
Five GCSE retrieval questions · 18 August 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.092 in standard form
Answer: 9.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x + 6
Answer: (x + 3)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 56°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.57cm -
4. Ratio Mixed ratio problems
In ratio 3:9:6, what fraction is the third part?
Answer: 1⁄3 -
5. Statistics Mean
The mean of 5 numbers is 39. If 4 of them are 34, 49, 35, 23, what is the missing number?
Answer: 54