Keystones — Lintel
Five GCSE retrieval questions · 13 February 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.089 in standard form
Answer: 8.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 14x + 33
Answer: (x + 11)(x + 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 55°. Find opposite. Give your answer to 2 decimal places
Answer: 14.28cm -
4. Ratio Mixed ratio problems
£145.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £58.00 -
5. Statistics Mean
Calculate the mean of: 31, 47, 33, 47, 19, 40, 45. Give your answer to 2 decimal places
Answer: 37.43