Keystones — Lintel
Five GCSE retrieval questions · 8 June 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 540,000 in standard form
Answer: 5.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 70
Answer: (x + 10)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 50°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.5cm -
4. Ratio Mixed ratio problems
In ratio 3:9:2, what fraction is the third part?
Answer: 1⁄7 -
5. Statistics Mean
The mean of 6 numbers is 37. If 5 of them are 47, 29, 50, 40, 31, what is the missing number?
Answer: 25