Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
6th December 1998
- 1Conditional Probability3 marks
A bag holds 7 red and 3 blue counters. Two are taken without replacement. Given the first was red, what is the probability the second is blue?
- 2Histograms3 marks
On a histogram the bar for 20 < x <= 25 has a frequency density of 1.2. How many values are in that class?
- 3Bounds3 marks
x = 154 and y = 58, each correct to the nearest whole number. Work out the upper bound of x - y.
- 4The Nth Term of a Quadratic Sequence3 marks
Work out the nth term of the quadratic sequence 4, 11, 22, 37, ...
- 5Velocity Time Graphs2 marks
A train slows steadily from 38 m/s to rest in 4 seconds. Work out its deceleration.
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