Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
6th April 2017
- 1Conditional Probability3 marks
A bag holds 4 red, 6 blue and 4 green counters. Two are taken without replacement. Given neither is green, what is the probability both are red?
- 2Histograms3 marks
On a histogram the bar for 40 < x <= 50 has a frequency density of 3.5. How many values are in that class?
- 3Surds3 marks
Simplify sqrt(18) + sqrt(50), giving your answer in the form a sqrt(b).
- 4Rearranging Harder Formulae3 marks
Make x the subject of 7x + 7 = y(x + 7).
- 5Velocity Time Graphs2 marks
A train slows steadily from 34 m/s to rest in 8 seconds. Work out its deceleration.
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