Keystones — Lintel
Five GCSE retrieval questions · 31 March 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 150,000 in standard form
Answer: 1.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 16
Answer: (x - 2)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 28°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.96cm -
4. Ratio Mixed ratio problems
In ratio 8:3:3, what fraction is the first part?
Answer: 4⁄7 -
5. Statistics Mean
The mean of 5 numbers is 29. If 4 of them are 40, 29, 33, 23, what is the missing number?
Answer: 20