Daily Practice

Higher Plus

9th September 1990

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

1
Bounds3 marks
x = 45 and y = 16, each correct to the nearest whole number. Work out the upper bound of x - y.
2
Inverse and Composite Functions3 marks
f(x) = 8x - 11. Work out the inverse function f^-1(x).
3
Direct and Inverse Proportion Depth3 marks
y is inversely proportional to x^2. When x = 2, y = 50. Work out y when x = 5.
4
The Sine Rule3 marks
In triangle ABC, angle A is 42°, side a is 9 cm and side b is 7 cm. Work out the acute angle B, to 1 decimal place.
5
Conditional Probability3 marks
A bag holds 4 red and 10 blue counters. Two are taken without replacement. Given the first was red, what is the probability the second is blue?

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