Daily Practice

Higher Plus

8th March 1986

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

1
Probability Equation Questions3 marks
A bag holds 6 red and n blue counters. The probability of taking a red is 3/5. Work out n.
2
Histograms3 marks
On a histogram the bar for 0 < x <= 10 has a frequency density of 1.2. How many values are in that class?
3
Bounds3 marks
A car covers 300 m (to the nearest 10 m) in 6 s (to the nearest second). Work out the lower bound of its speed, to 2 decimal places.
4
Quadratic Inequalities3 marks
Solve x^2 + 11x + 30 > 0.
5
Velocity Time Graphs2 marks
A train slows steadily from 39 m/s to rest in 8 seconds. Work out its deceleration.

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