Keystones — Lintel
Five GCSE retrieval questions · 4 August 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
6800000
Answer: 6.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 25°. Find adjacent side
Answer: 16.3cm -
4. Ratio Mixed ratio problems
Express the first part of 3:4 as a fraction in simplest form
Answer: 3⁄7 -
5. Statistics Mean
The mean of 4 numbers is 26. If 3 of them are 48, 39, 21, what is the missing number?
Answer: -4