Keystones — Lintel
Five GCSE retrieval questions · 17 April 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.066 in standard form
Answer: 6.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x + 2
Answer: (x + 2)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 56°. Find adjacent side. Give your answer to 2 decimal places
Answer: 21.25cm -
4. Ratio Mixed ratio problems
In ratio 10:3:1, what fraction is the third part?
Answer: 1⁄14 -
5. Statistics Mean
Calculate the mean of: 21, 15, 25, 5, 47, 5, 11, 35
Answer: 20.5