Keystones — Lintel
Five GCSE retrieval questions · 11 April 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 630,000,000 in standard form
Answer: 6.3 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 47°. Find opposite. Give your answer to 2 decimal places
Answer: 25.74cm -
4. Ratio Mixed ratio problems
Divide 168 in the ratio 4:1:1
Answer: 112, 28 and 28 -
5. Statistics Mean
Calculate the mean of: 47, 38, 15, 49, 20, 10. Give your answer to 2 decimal places
Answer: 29.83