Keystones — Lintel
Five GCSE retrieval questions · 17 May 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
25000
Answer: 2.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x + 4
Answer: (x - 2)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 60°. Find adjacent side
Answer: 13.5cm -
4. Ratio Mixed ratio problems
In ratio 4:3:4, what fraction is the second part?
Answer: 3⁄11 -
5. Statistics Mean
The mean of 4 numbers is 20. If 3 of them are 31, 46, 22, what is the missing number?
Answer: -19