Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
9th January 2015
- 1Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 8, y = 40. Work out y when x = 6.
- 2Perpendicular Lines and the equation of a tangent2 marks
A line has gradient -2. Work out the gradient of a line perpendicular to it.
- 3Conditional Probability3 marks
21 students study Spanish and 7 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 4Capture Recapture2 marks
A capture-recapture estimate is made of the snail population of a hedgerow. State one assumption the method relies on.
- 5Surds2 marks
Write sqrt(20) in the form a sqrt(b), where b is as small as possible.
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