Keystones — Lintel
Five GCSE retrieval questions · 3 June 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 120,000 in standard form
Answer: 1.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 14
Answer: (x + 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 46°. Find adjacent side. Give your answer to 2 decimal places
Answer: 23.62cm -
4. Ratio Mixed ratio problems
In ratio 7:2:8, what fraction is the second part?
Answer: 2⁄17 -
5. Statistics Mean
The mean of 6 numbers is 34. If 5 of them are 22, 44, 21, 42, 38, what is the missing number?
Answer: 37