Daily Practice
Higher Plus
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11th March 1975
- 13d Pythagoras and Trigonometry3 marks
A cuboid measures 12 cm by 11 cm by 10 cm. Work out the length of the longest diagonal inside it, to 1 decimal place.
- 2Probability Equation Questions3 marks
A bag holds 8 red and n blue counters. The probability of taking a red is 4/5. Work out n.
- 3Histograms2 marks
On a histogram, a 4-wide bar and a 8-wide bar have the same frequency density of 2. How many more values are in the wider class?
- 4Surds3 marks
Expand and simplify (7 + sqrt(11))(7 - sqrt(11)).
- 5Inverse and Composite Functions3 marks
f(x) = 8x - 4. Work out the inverse function f^-1(x).
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