Keystones — Lintel
Five GCSE retrieval questions · 30 July 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 23,000 in standard form
Answer: 2.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 16
Answer: (x + 8)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 58°. Find opposite. Give your answer to 2 decimal places
Answer: 25.61cm -
4. Ratio Mixed ratio problems
In ratio 9:8:7, what fraction is the first part?
Answer: 3⁄8 -
5. Statistics Mean
Calculate the mean of: 12, 21, 18, 19, 41, 14, 11. Give your answer to 2 decimal places
Answer: 19.43