Daily Practice

Higher Plus

9th August 1977

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

1
Perpendicular Lines and the equation of a tangent3 marks
The point (12, 16) lies on the circle x^2 + y^2 = 400. Work out the gradient of the tangent to the circle at that point.
2
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?
3
Histograms3 marks
A histogram has two bars: one 5 units wide with frequency density 2, one 5 units wide with density 3.5. How many values in total?
4
Surds3 marks
Expand and simplify (2 + sqrt(10))(2 - sqrt(10)).
5
Completing the Square3 marks
Work out the coordinates of the turning point of y = x^2 + 16x - 11.

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