Daily Practice

Higher Plus

30th August 1990

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 x^3. When x = 2, y = 16. Work out y when x = 5.
2
The Sine Rule3 marks
In triangle ABC, angle A is 48°, side a is 17 cm and side b is 9 cm. Work out the acute angle B, to 1 decimal place.
3
Conditional Probability3 marks
A bag holds 4 red and 4 blue counters. Two are taken without replacement. Given the first was red, what is the probability the second is blue?
4
Histograms3 marks
On a histogram the bar for 40 < x <= 60 has a frequency density of 1.5. How many values are in that class?
5
Surds3 marks
Simplify sqrt(45) + sqrt(20), giving your answer in the form a sqrt(b).

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