Keystones — Lintel
Five GCSE retrieval questions · 18 May 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.006
Answer: 6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 45°. Find adjacent side
Answer: 25.5cm -
4. Ratio Mixed ratio problems
In ratio 4:4:1, what fraction is the second part?
Answer: 4⁄9 -
5. Statistics Mean
The mean of 6 numbers is 34. If 5 of them are 26, 48, 48, 32, 28, what is the missing number?
Answer: 22