Daily Practice
Higher Plus
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3rd April 1981
- 1Probability Equation Questions3 marks
A bag holds 3 red and n blue counters. The probability of taking a red is 3/7. Work out n.
- 2Histograms3 marks
On a histogram the bar for 0 < x <= 10 has a frequency density of 0.4. How many values are in that class?
- 3Surds3 marks
Rationalise the denominator of 20/sqrt(5), giving your answer in its simplest form.
- 4Algebraic Fractions3 marks
Write 5/(x + 1) + 3/(x + 3) as a single fraction.
- 5Velocity Time Graphs2 marks
A train slows steadily from 13 m/s to rest in 5 seconds. Work out its deceleration.
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