Keystones — Lintel
Five GCSE retrieval questions · 5 May 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.07
Answer: 7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 2)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 43°. Find adjacent side
Answer: 27.8cm -
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 5 numbers is 40. If 4 of them are 32, 50, 26, 30, what is the missing number?
Answer: 62