Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
7th January 2008
- 1Histograms3 marks
A histogram has two bars: one 20 units wide with frequency density 1.2, one 25 units wide with density 0.6. How many values in total?
- 2Bounds3 marks
A block has mass 900 g (to the nearest 10 g) and volume 19 cm^3 (to the nearest cm^3). Work out the upper bound of its density, to 2 decimal places.
- 3Algebraic Fractions3 marks
Write 6/(x - 6) + 4/(x + 3) as a single fraction.
- 4Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 4, y = 32. Work out the positive value of x when y = 98.
- 53d Pythagoras and Trigonometry3 marks
A cuboid measures 6 cm by 9 cm by 4 cm. Work out the length of the longest diagonal inside it, to 1 decimal place.
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