Keystones — Lintel
Five GCSE retrieval questions · 17 March 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 3,400,000 in standard form
Answer: 3.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 14
Answer: (x + 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 39°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.2cm -
4. Ratio Mixed ratio problems
In ratio 2:10:5, what fraction is the first part?
Answer: 2⁄17 -
5. Statistics Mean
The mean of 4 numbers is 37. If 3 of them are 48, 28, 42, what is the missing number?
Answer: 30