Keystones — Lintel
Five GCSE retrieval questions · 21 October 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 2,300,000 in standard form
Answer: 2.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 28°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.42cm -
4. Ratio Mixed ratio problems
In ratio 1:11:10, what fraction is the third part?
Answer: 5⁄11 -
5. Statistics Mean
The mean of 4 numbers is 23. If 3 of them are 20, 37, 23, what is the missing number?
Answer: 12