Keystones — Lintel
Five GCSE retrieval questions · 25 March 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 12,000,000 in standard form
Answer: 1.2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 60°. Find opposite. Give your answer to 2 decimal places
Answer: 29.44cm -
4. Ratio Mixed ratio problems
£110.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £44.00 -
5. Statistics Mean
Calculate the mean of: 10, 24, 8, 17, 26, 26, 13, 42
Answer: 20.75