Keystones — Lintel
Five GCSE retrieval questions · 10 June 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0035 in standard form
Answer: 3.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 44
Answer: (x + 11)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 52°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.63cm -
4. Ratio Mixed ratio problems
In ratio 10:5:10, what fraction is the second part?
Answer: 1⁄5 -
5. Statistics Mean
Calculate the mean of: 5, 19, 9, 9, 49, 32, 19. Give your answer to 2 decimal places
Answer: 20.29