Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
- 1Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 5, y = 55. Work out y when x = 6.
- 2Vectors3 marks
a is the column vector (1, -4) and b is (1, -6). Work out 2a - 4b as a column vector.
- 3Probability Trees3 marks
7 of 10 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Capture Recapture2 marks
A capture-recapture estimate is made of the newt population of a stream. State one assumption the method relies on.
- 5Surds2 marks
Write sqrt(98) in the form a sqrt(b), where b is as small as possible.
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