Daily Practice

Higher Plus

23rd April 1970

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 = 16, y = 32. Work out y when x = 81.
2
The Cosine Rule3 marks
A triangle has sides of 7 cm and 9 cm with an angle of 58° between them. Work out the third side, to 1 decimal place.
3
Conditional Probability3 marks
A bag holds 7 red, 7 blue and 4 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, 3, 2, 1. Which class contains the median?
5
Surds3 marks
Simplify sqrt(20) + sqrt(245), giving your answer in the form a sqrt(b).

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