Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
12th February 2012
- 1Velocity Time Graphs2 marks
A train slows steadily from 15 m/s to rest in 4 seconds. Work out its deceleration.
- 2The Cosine Rule3 marks
A triangle has sides of 9 cm and 12 cm with an angle of 69° between them. Work out the third side, to 1 decimal place.
- 3Conditional Probability3 marks
A bag holds 7 red, 6 blue and 6 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 0 < x <= 10 has a frequency density of 1.5. How many values are in that class?
- 5Bounds3 marks
x = 31 and y = 9, each correct to the nearest whole number. Work out the upper bound of x - y.
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