Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
3rd September 2012
- 1Repeated Percentage Change3 marks
A price rises by 20% and then falls by 20%. Work out the overall percentage change, to 2 decimal places.
- 2Vectors3 marks
a is the column vector (-5, 6) and b is (3, 6). Work out 3a - 2b as a column vector.
- 3Probability Trees3 marks
3 of 6 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Cumulative Frequency2 marks
A cumulative frequency graph is drawn for 108 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 5Surds2 marks
Write sqrt(8) in the form a sqrt(b), where b is as small as possible.
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