Higher Plus
- 1Perpendicular Lines and the equation of a tangent3 marks
The point (8, 15) lies on the circle x^2 + y^2 = 289. Work out the gradient of the tangent to the circle at that point.
- 2Conditional Probability3 marks
A bag holds 6 red, 4 blue and 2 green counters. Two are taken without replacement. Given neither is green, what is the probability both are red?
- 3Histograms2 marks
On a histogram, a 4-wide bar and a 12-wide bar have the same frequency density of 3. How many more values are in the wider class?
- 4Surds3 marks
Simplify sqrt(18) + sqrt(50), giving your answer in the form a sqrt(b).
- 5Algebraic Fractions3 marks
Write 4/(x + 3) + 2/(x + 6) as a single fraction.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of May 1967, including the monthly compilation PDF.