Daily Practice

Higher Plus

5th September 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 sqrt(x). When x = 9, y = 18. Work out y when x = 25.
2
The Cosine Rule3 marks
A triangle has sides of 11 cm and 6 cm with an angle of 80° between them. Work out the third side, to 1 decimal place.
3
Conditional Probability3 marks
A bag holds 5 red, 6 blue and 3 green counters. Two are taken without replacement. Given neither is green, what is the probability both are red?
4
Histograms3 marks
A histogram has four 10-wide classes from 0, with frequency densities 0.5, 1, 2, 3. Which class contains the median?
5
Bounds3 marks
A rectangle is 7 cm by 29 cm, each correct to the nearest cm. Work out the upper bound of its area.

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