Daily Practice

Higher Plus

14th December 1988

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 = 2, y = 48. Work out y when x = 5.
2
The Cosine Rule3 marks
A triangle has sides of 5 cm and 9 cm with an angle of 142° between them. Work out the third side, to 1 decimal place.
3
Conditional Probability3 marks
A bag holds 4 red, 7 blue and 3 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 40 < x <= 60 has a frequency density of 2.4. How many values are in that class?
5
Bounds3 marks
A rectangle is 8 cm by 27 cm, each correct to the nearest cm. Work out the upper bound of its area.

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