Keystones — Lintel
Five GCSE retrieval questions · 10 November 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000034 in standard form
Answer: 3.4 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 14x + 33
Answer: (x + 11)(x + 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 27.53cm -
4. Ratio Mixed ratio problems
£161.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £92.00 -
5. Statistics Mean
The mean of 6 numbers is 39. If 5 of them are 43, 34, 36, 26, 35, what is the missing number?
Answer: 60