Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
8th April 2010
- 1Histograms2 marks
On a histogram, a 10-wide bar and a 40-wide bar have the same frequency density of 3. How many more values are in the wider class?
- 2Surds3 marks
Simplify sqrt(18) + sqrt(18), giving your answer in the form a sqrt(b).
- 3Factorising Harder Quadratics3 marks
Solve 10x^2 - 31x + 15 = 0.
- 4Velocity Time Graphs3 marks
A cyclist speeds up steadily from 3 m/s to 14 m/s over 4 seconds. Use the area under the velocity-time graph to find the distance travelled.
- 5Perpendicular Lines and the equation of a tangent3 marks
The point (9, 40) lies on the circle x^2 + y^2 = 1681. Work out the gradient of the tangent to the circle at that point.
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