Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
17th August 1997
- 1Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^3. When x = 3, y = 108. Work out y when x = 2.
- 2The Cosine Rule3 marks
A triangle has sides 18 cm, 14 cm and 16 cm. Work out the angle opposite the 18 cm side, to 1 decimal place.
- 3Probability Equation Questions3 marks
A bag holds 8 red and n blue counters. The probability of taking a red is 4/5. Work out n.
- 4Histograms3 marks
On a histogram the bar for 60 < x <= 70 has a frequency density of 2.4. How many values are in that class?
- 5Bounds3 marks
x = 92 and y = 11, each correct to the nearest whole number. Work out the upper bound of x - y.
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