Keystones — Lintel
Five GCSE retrieval questions · 17 May 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00088 in standard form
Answer: 8.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 54
Answer: (x + 9)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 48°. Find opposite. Give your answer to 2 decimal places
Answer: 15.55cm -
4. Ratio Mixed ratio problems
£182.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £104.00 -
5. Statistics Mean
The mean of 4 numbers is 29. If 3 of them are 47, 35, 27, what is the missing number?
Answer: 7