Higher Plus
25th February 1972
- 13d Pythagoras and Trigonometry3 marks
A cuboid measures 8 cm by 13 cm by 3 cm. Work out the length of the longest diagonal inside it, to 1 decimal place.
- 2Probability Equation Questions3 marks
A bag holds 6 red and n blue counters. The probability of taking a red is 3/4. Work out n.
- 3Histograms3 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?
- 4Surds3 marks
Rationalise the denominator of 72/sqrt(6), giving your answer in its simplest form.
- 5Iteration3 marks
Use the iteration x(n+1) = cube root of (7x(n) + 4) with x(0) = 2. Work out x(1) to 3 decimal places.
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