Keystones — Lintel
Five GCSE retrieval questions · 15 January 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 460,000,000 in standard form
Answer: 4.6 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 17x + 60
Answer: (x - 5)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.71cm -
4. Ratio Mixed ratio problems
Express the first part of 11:4 as a fraction in simplest form
Answer: 11⁄15 -
5. Statistics Mean
The mean of 5 numbers is 31. If 4 of them are 28, 41, 22, 32, what is the missing number?
Answer: 32