Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
9th January 2013
- 1Probability Trees3 marks
2 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 9, 8, 10, 12. Write down the cumulative frequency at the end of the third class.
- 3Fractional and Negative Indices2 marks
Write 7^-3 as a fraction.
- 4Trigonometric and Exponential Graphs2 marks
The curve y = 2^x is drawn. Work out y when x = 4, and write down where the curve crosses the y-axis.
- 5Speed and Density2 marks
A block has volume 90 cm^3 and density 4 g/cm^3. Work out its mass.
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