Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
16th March 2005
- 1Probability Trees3 marks
4 of 7 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 2Cumulative Frequency2 marks
Four classes in order have frequencies 7, 6, 5, 12. Write down the cumulative frequency at the end of the third class.
- 3Surds2 marks
Write sqrt(45) in the form a sqrt(b), where b is as small as possible.
- 4Simultaneous Equations3 marks
5 teas and 3 cakes cost £15.45. 1 tea and 4 cakes cost £8.70. Find the price of a tea.
- 5Speed and Density2 marks
A block has volume 100 cm^3 and density 2.5 g/cm^3. Work out its mass.
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