Keystones — Lintel
Five GCSE retrieval questions · 1 April 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 6,100,000 in standard form
Answer: 6.1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 11
Answer: (x - 1)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 48°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.38cm -
4. Ratio Mixed ratio problems
Divide 60 in the ratio 1:3:2
Answer: 10, 30 and 20 -
5. Statistics Mean
The mean of 5 numbers is 27. If 4 of them are 27, 29, 29, 41, what is the missing number?
Answer: 9