Daily Practice

Higher Plus

10th September 1989

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 = 21. Work out y when x = 36.
2
The Cosine Rule3 marks
A triangle has sides of 6 cm and 15 cm with an angle of 130° between them. Work out the third side, to 1 decimal place.
3
Conditional Probability3 marks
A bag holds 6 red, 4 blue and 6 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 20-wide classes from 0, with frequency densities 2, 1, 3, 0.5. Which class contains the median?
5
Bounds3 marks
x = 76 and y = 39, each correct to the nearest whole number. Work out the upper bound of x - y.

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