Daily Practice

Higher Plus

4th March 1984

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 = 49, y = 28. Work out y when x = 16.
2
The Sine Rule3 marks
In triangle ABC, angle A is 68°, side a is 15 cm and side b is 12 cm. Work out the acute angle B, to 1 decimal place.
3
Conditional Probability3 marks
A bag holds 4 red and 6 blue counters. Two are taken without replacement. Given the first was red, what is the probability the second is blue?
4
Histograms3 marks
A histogram has four 20-wide classes from 0, with frequency densities 1, 3, 0.5, 2. Which class contains the median?
5
Bounds3 marks
x = 72 and y = 47, each correct to the nearest whole number. Work out the upper bound of x - y.

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