Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
18th February 2012
- 1Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 2, y = 12. Work out y when x = 8.
- 2Perpendicular Lines and the equation of a tangent2 marks
A line has gradient 4. Work out the gradient of a line perpendicular to it.
- 3Conditional Probability3 marks
22 students study Spanish and 6 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 4Box Plots2 marks
A box plot has minimum 11, lower quartile 20, median 28, upper quartile 37 and maximum 46. Work out the interquartile range.
- 5Surds2 marks
Write sqrt(45) in the form a sqrt(b), where b is as small as possible.
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