Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
14th July 2007
- 1Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 3, y = 18. Work out y when x = 6.
- 2Perpendicular Lines and the equation of a tangent2 marks
A line has gradient 5. Work out the gradient of a line perpendicular to it.
- 3Conditional Probability3 marks
18 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 15, lower quartile 23, median 30, upper quartile 33 and maximum 40. Work out the interquartile range.
- 5Reverse Percentages3 marks
A bill is £240 including VAT at 20%. Work out the amount before VAT.
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