Daily Practice

Higher Plus

8th November 1972

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 x^3. When x = 4, y = 320. Work out y when x = 3.
2
The Cosine Rule3 marks
A triangle has sides of 15 cm and 18 cm with an angle of 57° between them. Work out the third side, to 1 decimal place.
3
Conditional Probability3 marks
A bag holds 5 red, 5 blue and 4 green counters. Two are taken without replacement. Given neither is green, what is the probability both are red?
4
Histograms3 marks
On a histogram the bar for 30 < x <= 40 has a frequency density of 1.5. How many values are in that class?
5
Bounds3 marks
A rectangle is 19 cm by 25 cm, each correct to the nearest cm. Work out the upper bound of its area.

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