Keystones — Lintel
Five GCSE retrieval questions · 26 May 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00076
Answer: 7.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 30°. Find adjacent side
Answer: 30.3cm -
4. Ratio Mixed ratio problems
In ratio 1:2:4, what fraction is the second part?
Answer: 2⁄7 -
5. Statistics Mean
The mean of 4 numbers is 27. If 3 of them are 20, 33, 44, what is the missing number?
Answer: 11