Daily Practice

Higher Plus

24th September 1957

5 questions · 14 marks · Grades 8-9 · 51 question types in this band

1
Probability Equation Questions3 marks
A bag holds 6 counters, r of them red. Two are taken without replacement and P(both red) = 1/15. Work out r.
2
Histograms3 marks
On a histogram the bar for 50 < x <= 70 has a frequency density of 2.4. How many values are in that class?
3
Surds3 marks
Expand and simplify (5 + sqrt(10))(5 - sqrt(10)).
4
Completing the Square3 marks
Work out the coordinates of the turning point of y = x^2 + 12x + 6.
5
Velocity Time Graphs2 marks
A train slows steadily from 35 m/s to rest in 5 seconds. Work out its deceleration.

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