Keystones — Lintel
Five GCSE retrieval questions · 5 April 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 2,400,000 in standard form
Answer: 2.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 66
Answer: (x + 6)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 62°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.37cm -
4. Ratio Mixed ratio problems
Express the second part of 2:10 as a fraction in simplest form
Answer: 5⁄6 -
5. Statistics Mean
The mean of 4 numbers is 34. If 3 of them are 27, 50, 38, what is the missing number?
Answer: 21