Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
25th March 2011
- 1Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 7, y = 49. Work out y when x = 5.
- 2Vectors3 marks
a is the column vector (6, 0) and b is (5, 2). Work out 5a - 4b as a column vector.
- 3Probability Trees3 marks
2 of 6 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(12) in the form a sqrt(b), where b is as small as possible.
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