Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
14th April 1998
- 1Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^3. When x = 2, y = 48. Work out y when x = 4.
- 2The Cosine Rule3 marks
A triangle has sides 8 cm, 8 cm and 9 cm. Work out the angle opposite the 8 cm side, to 1 decimal place.
- 3Probability Equation Questions3 marks
A bag holds 4 red and n blue counters. The probability of taking a red is 2/5. Work out n.
- 4Histograms3 marks
On a histogram the bar for 10 < x <= 15 has a frequency density of 1.5. How many values are in that class?
- 5Surds3 marks
Expand and simplify (4 + sqrt(2))(4 - sqrt(2)).
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