Keystones — Lintel
Five GCSE retrieval questions · 30 January 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.064 in standard form
Answer: 6.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 20
Answer: (x + 4)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 46°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.23cm -
4. Ratio Mixed ratio problems
In ratio 7:4:2, what fraction is the first part?
Answer: 7⁄13 -
5. Statistics Mean
Calculate the mean of: 42, 22, 29, 11, 42, 46, 39
Answer: 33