Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
26th August 2006
- 1Probability Trees3 marks
3 of 8 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 2Box Plots2 marks
A box plot has minimum 14, lower quartile 22, median 31, upper quartile 33 and maximum 37. Work out the interquartile range.
- 3Surds2 marks
Write sqrt(98) in the form a sqrt(b), where b is as small as possible.
- 4Simultaneous Equations3 marks
3 teas and 4 cakes cost £18.15. 4 teas and 5 cakes cost £23.10. Find the price of a tea.
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 4, y = 80. Work out y when x = 9.
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