Keystones — Lintel
Five GCSE retrieval questions · 7 November 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 360,000 in standard form
Answer: 3.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x - 12
Answer: (x + 1)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 54°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.87cm -
4. Ratio Mixed ratio problems
Express the second part of 4:10 as a fraction in simplest form
Answer: 5⁄7 -
5. Statistics Mean
The mean of 6 numbers is 37. If 5 of them are 33, 28, 47, 40, 37, what is the missing number?
Answer: 37