Keystones — Lintel
Five GCSE retrieval questions · 15 May 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00034 in standard form
Answer: 3.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 13x + 36
Answer: (x + 9)(x + 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 42°. Find opposite. Give your answer to 2 decimal places
Answer: 15.31cm -
4. Ratio Mixed ratio problems
£224.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £128.00 -
5. Statistics Mean
Calculate the mean of: 11, 30, 12, 13, 33, 15, 39. Give your answer to 2 decimal places
Answer: 21.86