Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
- 1Perpendicular Lines and the equation of a tangent3 marks
The point (9, 12) lies on the circle x^2 + y^2 = 225. Work out the gradient of the tangent to the circle at that point.
- 2Conditional Probability3 marks
A bag holds 6 red, 5 blue and 5 green counters. Two are taken without replacement. Given neither is green, what is the probability both are red?
- 3Histograms3 marks
A histogram has two bars: one 10 units wide with frequency density 2, one 10 units wide with density 0.6. How many values in total?
- 4Bounds3 marks
A rectangle is 20 cm by 24 cm, each correct to the nearest cm. Work out the upper bound of its area.
- 5Inverse and Composite Functions3 marks
f(x) = 5x - 8 and g(x) = 5x + 4. Work out fg(-2).
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