Keystones — Lintel
Five GCSE retrieval questions · 23 April 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 610,000,000 in standard form
Answer: 6.1 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 12x + 11
Answer: (x + 11)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 39°. Find opposite. Give your answer to 2 decimal places
Answer: 21.05cm -
4. Ratio Mixed ratio problems
In ratio 10:12:5, what fraction is the third part?
Answer: 5⁄27 -
5. Statistics Mean
Calculate the mean of: 28, 5, 43, 7, 22, 5, 6. Give your answer to 2 decimal places
Answer: 16.57