Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
14th April 2020
- 1Conditional Probability3 marks
A bag holds 3 red and 7 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 60 < x <= 70 has a frequency density of 1.2. How many values are in that class?
- 3Surds3 marks
Expand and simplify (5 + sqrt(11))(5 - sqrt(11)).
- 4Completing the Square3 marks
Work out the coordinates of the turning point of y = x^2 + 10x - 15.
- 5Velocity Time Graphs2 marks
A train slows steadily from 34 m/s to rest in 10 seconds. Work out its deceleration.
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