Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
14th December 2003
- 1Direct and Inverse Proportion Depth3 marks
y is directly proportional to sqrt(x). When x = 9, y = 24. Work out y when x = 25.
- 2The Cosine Rule3 marks
A triangle has sides 17 cm, 9 cm and 10 cm. Work out the angle opposite the 17 cm side, to 1 decimal place.
- 3Probability Equation Questions3 marks
A bag holds 7 red and n blue counters. The probability of taking a red is 1/2. Work out n.
- 4Histograms3 marks
A histogram has four 10-wide classes from 0, with frequency densities 0.5, 1, 3, 2. Which class contains the median?
- 5Bounds3 marks
x = 48 and y = 33, each correct to the nearest whole number. Work out the upper bound of x - y.
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