Daily Practice

Higher Plus

3rd August 1962

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

1
Direct and Inverse Proportion Depth3 marks
y is inversely proportional to x^2. When x = 2, y = 50. Work out y when x = 5.
2
The Cosine Rule3 marks
A triangle has sides of 16 cm and 13 cm with an angle of 49° between them. Work out the third side, to 1 decimal place.
3
Conditional Probability3 marks
A bag holds 5 red, 7 blue and 5 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, 2, 3, 1. Which class contains the median?
5
Surds3 marks
Rationalise the denominator of 63/sqrt(7), giving your answer in its simplest form.

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