Keystones — Lintel
Five GCSE retrieval questions · 16 January 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
10000000
Answer: 1 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 62°. Find adjacent side
Answer: 7cm -
4. Ratio Mixed ratio problems
Express the first part of 3:6 as a fraction in simplest form
Answer: 1⁄3 -
5. Statistics Mean
The mean of 4 numbers is 25. If 3 of them are 33, 24, 41, what is the missing number?
Answer: 2