Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
19th February 2011
- 1Conditional Probability3 marks
20 students study Spanish and 10 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 2Box Plots2 marks
A box plot has minimum 3, lower quartile 6, median 10, upper quartile 15 and maximum 19. Work out the interquartile range.
- 3Recurring Decimals to Fractions3 marks
Write the recurring decimal 0.777... as a fraction in its simplest form.
- 4Drawing Quadratic Graphs2 marks
For the curve y = x^2 + 7x + 6, work out y when x = -2.
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 4, y = 144. Work out y when x = 2.
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