Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
- 1Probability Equation Questions3 marks
A bag holds 9 counters, r of them red. Two are taken without replacement and P(both red) = 1/36. Work out r.
- 2Histograms3 marks
On a histogram the bar for 10 < x <= 30 has a frequency density of 1.5. How many values are in that class?
- 3Bounds3 marks
A rectangle is 10 cm by 16 cm, each correct to the nearest cm. Work out the upper bound of its area.
- 4Algebraic Fractions3 marks
Write 7/(x - 1) + 3/(x + 2) as a single fraction.
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^3. When x = 4, y = 384. Work out y when x = 5.
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