Higher Plus
23rd December 1966
- 13d Pythagoras and Trigonometry3 marks
A cuboid measures 12 cm by 10 cm by 8 cm. Work out the length of the longest diagonal inside it, to 1 decimal place.
- 2Probability Equation Questions3 marks
A bag holds 7 red and n blue counters. The probability of taking a red is 7/12. Work out n.
- 3Histograms2 marks
On a histogram, a 5-wide bar and a 10-wide bar have the same frequency density of 2.5. How many more values are in the wider class?
- 4Surds3 marks
Rationalise the denominator of 42/sqrt(7), giving your answer in its simplest form.
- 5Completing the Square3 marks
Write x^2 + 4x - 6 in the form (x + a)^2 + b.
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