Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
13th October 2022
- 1Probability Equation Questions3 marks
A bag holds 7 counters, r of them red. Two are taken without replacement and P(both red) = 1/21. Work out r.
- 2Histograms3 marks
On a histogram the bar for 50 < x <= 55 has a frequency density of 0.4. How many values are in that class?
- 3Surds3 marks
Simplify sqrt(18) + sqrt(32), giving your answer in the form a sqrt(b).
- 4Completing the Square3 marks
Write x^2 + 2x + 3 in the form (x + a)^2 + b.
- 5Velocity Time Graphs2 marks
A train slows steadily from 24 m/s to rest in 5 seconds. Work out its deceleration.
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