Daily Practice

Higher Plus

7th March 1991

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

1
Histograms2 marks
On a histogram, a 4-wide bar and a 12-wide bar have the same frequency density of 3. How many more values are in the wider class?
2
Surds3 marks
Simplify sqrt(50) + sqrt(50), giving your answer in the form a sqrt(b).
3
Completing the Square3 marks
Write x^2 - 14x - 7 in the form (x + a)^2 + b.
4
Velocity Time Graphs3 marks
A tram runs at 17 m/s for 20 s, then slows steadily to rest over 10 s. Work out its average speed for the whole journey, to 2 decimal places.
5
3d Pythagoras and Trigonometry3 marks
A cuboid measures 10 cm by 8 cm by 15 cm. Work out the length of the longest diagonal inside it, to 1 decimal place.

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