Keystones — Lintel
Five GCSE retrieval questions · 23 December 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000091 in standard form
Answer: 9.1 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 54
Answer: (x + 9)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 43°. Find opposite. Give your answer to 2 decimal places
Answer: 16.79cm -
4. Ratio Mixed ratio problems
£294.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £84.00 -
5. Statistics Mean
Calculate the mean of: 27, 37, 42, 9, 48, 9, 32. Give your answer to 2 decimal places
Answer: 29.14