Keystones — Lintel
Five GCSE retrieval questions · 9 October 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00094 in standard form
Answer: 9.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 12x + 36
Answer: (x + 6)(x + 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 39°. Find opposite. Give your answer to 2 decimal places
Answer: 15.39cm -
4. Ratio Mixed ratio problems
In ratio 3:8:4, what fraction is the second part?
Answer: 8⁄15 -
5. Statistics Mean
Calculate the mean of: 5, 20, 36, 49, 23, 29
Answer: 27