Keystones — Lintel
Five GCSE retrieval questions · 1 May 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
7000000
Answer: 7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 27°. Find adjacent side
Answer: 15.cm -
4. Ratio Mixed ratio problems
Express the first part of 3:5 as a fraction in simplest form
Answer: 3⁄8 -
5. Statistics Mean
The mean of 5 numbers is 22. If 4 of them are 27, 24, 32, 22, what is the missing number?
Answer: 5