Keystones — Lintel
Five GCSE retrieval questions · 14 July 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00096 in standard form
Answer: 9.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 55
Answer: (x + 11)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 39°. Find opposite. Give your answer to 2 decimal places
Answer: 17.82cm -
4. Ratio Mixed ratio problems
£175.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £105.00 -
5. Statistics Mean
The mean of 4 numbers is 36. If 3 of them are 45, 22, 41, what is the missing number?
Answer: 36