Keystones — Lintel
Five GCSE retrieval questions · 19 October 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 8,500,000 in standard form
Answer: 8.5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 40
Answer: (x + 10)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 62°. Find adjacent side. Give your answer to 2 decimal places
Answer: 8.45cm -
4. Ratio Mixed ratio problems
In ratio 6:5:4, what fraction is the first part?
Answer: 2⁄5 -
5. Statistics Mean
The mean of 4 numbers is 29. If 3 of them are 44, 34, 20, what is the missing number?
Answer: 18