Keystones — Lintel
Five GCSE retrieval questions · 19 November 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 8,800,000 in standard form
Answer: 8.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 28
Answer: (x + 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 53°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.84cm -
4. Ratio Mixed ratio problems
Express the first part of 5:12 as a fraction in simplest form
Answer: 5⁄17 -
5. Statistics Mean
The mean of 5 numbers is 31. If 4 of them are 37, 46, 17, 49, what is the missing number?
Answer: 6