Keystones — Lintel
Five GCSE retrieval questions · 5 October 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
2700000
Answer: 2.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 9
Answer: (x - 3)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 45°. Find adjacent side
Answer: 18.4cm -
4. Ratio Mixed ratio problems
Divide 60 in the ratio 1:2:1
Answer: 15, 30 and 15 -
5. Statistics Mean
The mean of 6 numbers is 22. If 5 of them are 30, 19, 22, 40, 15, what is the missing number?
Answer: 6