Keystones — Lintel
Five GCSE retrieval questions · 24 February 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
7700000
Answer: 7.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 62°. Find adjacent side
Answer: 16.4cm -
4. Ratio Mixed ratio problems
In ratio 3:1:1, what fraction is the second part?
Answer: 1⁄5 -
5. Statistics Mean
The mean of 6 numbers is 24. If 5 of them are 39, 46, 25, 32, 31, what is the missing number?
Answer: -29