Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
6th December 2013
- 1Histograms3 marks
A histogram has two bars: one 10 units wide with frequency density 2, one 20 units wide with density 0.8. How many values in total?
- 2Surds3 marks
Rationalise the denominator of 84/sqrt(7), giving your answer in its simplest form.
- 3Quadratic Simultaneous Equations3 marks
Solve x^2 + y^2 = 100 and y = x - 2 simultaneously.
- 4Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 2, y = 32. Work out the positive value of x when y = 200.
- 53d Pythagoras and Trigonometry3 marks
A cuboid measures 3 cm by 11 cm by 10 cm. Work out the length of the longest diagonal inside it, to 1 decimal place.
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