Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
4th January 1998
- 1Probability Equation Questions3 marks
A bag holds 5 red and n blue counters. The probability of taking a red is 5/9. Work out n.
- 2Histograms3 marks
On a histogram the bar for 40 < x <= 45 has a frequency density of 0.4. How many values are in that class?
- 3Bounds3 marks
x = 153 and y = 70, each correct to the nearest whole number. Work out the upper bound of x - y.
- 4Algebraic Fractions3 marks
Write 6/(x + 3) + 7/(x - 2) 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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