Keystones — Lintel
Five GCSE retrieval questions · 28 June 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0015 in standard form
Answer: 1.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 16
Answer: (x + 8)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 56°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.01cm -
4. Ratio Mixed ratio problems
In ratio 2:6:12, what fraction is the third part?
Answer: 3⁄5 -
5. Statistics Mean
Calculate the mean of: 12, 37, 21, 20, 13, 33, 17. Give your answer to 2 decimal places
Answer: 21.86