Daily Practice · Higher Plus

Daily Practice - Higher Plus

5th December 1991

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

1
Direct and Inverse Proportion Depth3 marks
y is directly proportional to sqrt(x). When x = 9, y = 24. Work out y when x = 16.
2
Finding the Area of Any Triangle3 marks
A triangle has sides of 7 cm and 12 cm and an area of 29.70 cm^2. Work out the acute angle between those two sides, to the nearest degree.
3
Probability Equation Questions3 marks
A bag holds 11 counters, r of them red. Two are taken without replacement and P(both red) = 2/11. Work out r.
4
Histograms3 marks
A histogram has four 20-wide classes from 0, with frequency densities 3, 0.5, 1, 2. Which class contains the median?
5
Surds3 marks
Simplify sqrt(75) + sqrt(12), giving your answer in the form a sqrt(b).

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