Keystones — Lintel
Five GCSE retrieval questions · 10 December 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 9,300,000 in standard form
Answer: 9.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 42
Answer: (x + 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 40°. Find opposite. Give your answer to 2 decimal places
Answer: 21.82cm -
4. Ratio Mixed ratio problems
In ratio 4:6:1, what fraction is the first part?
Answer: 4⁄11 -
5. Statistics Mean
Calculate the mean of: 31, 34, 13, 10, 30, 29, 25, 28
Answer: 25