Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
17th June 2011
- 1Velocity Time Graphs2 marks
A train slows steadily from 21 m/s to rest in 4 seconds. Work out its deceleration.
- 2The Cosine Rule3 marks
A triangle has sides of 7 cm and 15 cm with an angle of 120° between them. Work out the third side, to 1 decimal place.
- 3Conditional Probability3 marks
A bag holds 7 red, 5 blue and 3 green counters. Two are taken without replacement. Given neither is green, what is the probability both are red?
- 4Histograms3 marks
On a histogram the bar for 60 < x <= 65 has a frequency density of 2.4. How many values are in that class?
- 5Surds3 marks
Rationalise the denominator of 10/sqrt(5), giving your answer in its simplest form.
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