Daily Practice · Higher
Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
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8th November 2017
- 1Probability Trees3 marks
2 of 10 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 10, 9, 5, 8. 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.
- 4Factorising Harder Quadratics3 marks
Factorise 5x^2 - 14x - 24.
- 5Speed and Density2 marks
A block has volume 165 cm^3 and density 7.5 g/cm^3. Work out its mass.
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