Keystones — Lintel
Five GCSE retrieval questions · 22 April 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 52,000 in standard form
Answer: 5.2 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 57°. Find adjacent side. Give your answer to 2 decimal places
Answer: 8.71cm -
4. Ratio Mixed ratio problems
In ratio 10:10:3, what fraction is the second part?
Answer: 10⁄23 -
5. Statistics Mean
The mean of 4 numbers is 23. If 3 of them are 38, 22, 26, what is the missing number?
Answer: 6