Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
23rd October 2011
- 1Probability Equation Questions3 marks
A bag holds 7 red and n blue counters. The probability of taking a red is 7/12. Work out n.
- 2Histograms3 marks
On a histogram the bar for 10 < x <= 15 has a frequency density of 0.4. How many values are in that class?
- 3Bounds3 marks
x = 141 and y = 77, each correct to the nearest whole number. Work out the upper bound of x - y.
- 4Proof3 marks
Prove that the sum of 5 consecutive integers is always a multiple of 5. State the simplified sum you would use.
- 5Velocity Time Graphs2 marks
A train slows steadily from 13 m/s to rest in 8 seconds. Work out its deceleration.
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