Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
10th December 1998
- 1Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^3. When x = 2, y = 32. Work out y when x = 3.
- 2The Cosine Rule3 marks
A triangle has sides 14 cm, 10 cm and 15 cm. Work out the angle opposite the 14 cm side, to 1 decimal place.
- 3Probability Equation Questions3 marks
A bag holds 6 red and n blue counters. The probability of taking a red is 1/2. Work out n.
- 4Histograms3 marks
On a histogram the bar for 50 < x <= 70 has a frequency density of 1.2. How many values are in that class?
- 5Surds3 marks
Simplify sqrt(8) + sqrt(32), giving your answer in the form a sqrt(b).
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