Keystones — Lintel
Five GCSE retrieval questions · 21 January 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 76,000 in standard form
Answer: 7.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 7
Answer: (x + 1)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 48°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.4cm -
4. Ratio Mixed ratio problems
In ratio 1:1:4, what fraction is the third part?
Answer: 2⁄3 -
5. Statistics Mean
Calculate the mean of: 36, 32, 27, 20, 27, 37, 28, 15
Answer: 27.75