Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
14th March 2010
- 1Conditional Probability3 marks
A bag holds 5 red, 3 blue and 3 green counters. Two are taken without replacement. Given neither is green, what is the probability both are red?
- 2Histograms3 marks
On a histogram the bar for 20 < x <= 25 has a frequency density of 2.4. How many values are in that class?
- 3Bounds3 marks
x = 82 and y = 5, each correct to the nearest whole number. Work out the upper bound of x - y.
- 4Quadratic Inequalities3 marks
Solve x^2 - 4x - 5 > 0.
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^3. When x = 3, y = 81. Work out y when x = 4.
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