Keystones — Lintel
Five GCSE retrieval questions · 28 December 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
6600000
Answer: 6.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x + 6
Answer: (x - 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 42°. Find adjacent side
Answer: 17.cm -
4. Ratio Mixed ratio problems
In ratio 3:3:4, what fraction is the second part?
Answer: 3⁄10 -
5. Statistics Mean
The mean of 5 numbers is 32. If 4 of them are 47, 33, 29, 40, what is the missing number?
Answer: 11