Keystones — Lintel
Five GCSE retrieval questions · 14 June 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
9100000
Answer: 9.1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 43°. Find adjacent side
Answer: 16.cm -
4. Ratio Mixed ratio problems
Express the first part of 6:4 as a fraction in simplest form
Answer: 3⁄5 -
5. Statistics Mean
The mean of 5 numbers is 36. If 4 of them are 25, 26, 32, 20, what is the missing number?
Answer: 77