Higher Plus
2nd March 1972
- 13d Pythagoras and Trigonometry3 marks
A cuboid measures 8 cm by 6 cm by 11 cm tall. Work out the angle between its longest internal diagonal and the base, to 1 decimal place.
- 2Conditional Probability3 marks
A bag holds 10 red and 3 blue counters. Two are taken without replacement. Given the first was red, what is the probability the second is blue?
- 3Histograms2 marks
On a histogram, a 5-wide bar and a 10-wide bar have the same frequency density of 1.5. How many more values are in the wider class?
- 4Surds3 marks
Simplify sqrt(12) + sqrt(147), giving your answer in the form a sqrt(b).
- 5The Nth Term of a Quadratic Sequence3 marks
Work out the nth term of the quadratic sequence 10, 17, 28, 43, ...
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