Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
31st March 2008
- 1Cumulative Frequency2 marks
A cumulative frequency graph is drawn for 180 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 2Surds2 marks
Write sqrt(72) in the form a sqrt(b), where b is as small as possible.
- 3Parallel and Perpendicular Lines3 marks
A line has equation y = 3x + 1. Work out the gradient of any line perpendicular to it.
- 4Repeated Percentage Change3 marks
A price rises by 25% and then falls by 10%. Work out the overall percentage change, to 2 decimal places.
- 5Enlarging with Negative Scale Factors3 marks
The point (-5, 6) is enlarged by scale factor -1 about the centre (0, -1). Write down the coordinates of the image.
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