Daily Practice

Higher Plus

12th October 1986

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

1
Bounds3 marks
x = 66 and y = 41, each correct to the nearest whole number. Work out the upper bound of x - y.
2
Inverse and Composite Functions3 marks
f(x) = 3x + 2. Work out the inverse function f^-1(x).
3
Direct and Inverse Proportion Depth3 marks
y is directly proportional to sqrt(x). When x = 49, y = 42. Work out y when x = 81.
4
Finding the Area of Any Triangle3 marks
A triangle has sides of 14 cm and 7 cm and an area of 42.44 cm^2. Work out the acute angle between those two sides, to the nearest degree.
5
Probability Equation Questions3 marks
A bag holds 12 counters, r of them red. Two are taken without replacement and P(both red) = 14/33. Work out r.

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