Daily Practice
Higher Plus
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18th December 1984
- 13d Pythagoras and Trigonometry3 marks
A cuboid measures 15 cm by 6 cm by 11 cm. Work out the length of the longest diagonal inside it, to 1 decimal place.
- 2Probability Equation Questions3 marks
A bag holds 5 red and n blue counters. The probability of taking a red is 5/13. Work out n.
- 3Histograms3 marks
A histogram has two bars: one 10 units wide with frequency density 2.5, one 25 units wide with density 3.5. How many values in total?
- 4Surds3 marks
Expand and simplify (2 + sqrt(11))(2 - sqrt(11)).
- 5Inverse and Composite Functions3 marks
f(x) = 2x - 10. Work out the inverse function f^-1(x).
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Any date always gives the same five questions, so a sheet can be set again or shared. All of December 1984, including the monthly compilation PDF.