Daily Practice · Higher Plus

Daily Practice - Higher Plus

5th September 1995

5 questions · 15 marks · Grades 8-9 · 51 question types in this band

1
Probability Equation Questions3 marks
A bag holds 10 counters, r of them red. Two are taken without replacement and P(both red) = 7/15. Work out r.
2
Histograms3 marks
On a histogram the bar for 10 < x <= 30 has a frequency density of 1.5. How many values are in that class?
3
Surds3 marks
Expand and simplify (9 + sqrt(11))(9 - sqrt(11)).
4
Quadratic Inequalities3 marks
Solve x^2 - 7x + 10 < 0.
5
Direct 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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