Keystones — Lintel
Five GCSE retrieval questions · 23 August 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
84000
Answer: 8.4 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 48°. Find adjacent side
Answer: 16.cm -
4. Ratio Mixed ratio problems
In ratio 2:2:3, what fraction is the second part?
Answer: 2⁄7 -
5. Statistics Mean
The mean of 6 numbers is 29. If 5 of them are 49, 50, 23, 38, 47, what is the missing number?
Answer: -33