Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
11th February 1998
- 1Bounds3 marks
A rectangle is 12 cm by 15 cm, each correct to the nearest cm. Work out the upper bound of its area.
- 2Completing the Square3 marks
Write x^2 - 8x - 8 in the form (x + a)^2 + b.
- 3Direct and Inverse Proportion Depth3 marks
y is inversely proportional to x^2. When x = 4, y = 50. Work out y when x = 5.
- 4Finding the Area of Any Triangle3 marks
A triangle has sides of 7 cm and 7 cm and an area of 12.25 cm^2. Work out the acute angle between those two sides, to the nearest degree.
- 5Probability Equation Questions3 marks
A bag holds 11 counters, r of them red. Two are taken without replacement and P(both red) = 1/55. Work out r.
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