Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
19th January 2003
- 13d Pythagoras and Trigonometry3 marks
A cuboid measures 8 cm by 10 cm by 12 cm tall. Work out the angle between its longest internal diagonal and the base, to 1 decimal place.
- 2Conditional Probability3 marks
A bag holds 7 red and 4 blue counters. Two are taken without replacement. Given the first was red, what is the probability the second is blue?
- 3Histograms2 marks
On a histogram, a 5-wide bar and a 15-wide bar have the same frequency density of 3. How many more values are in the wider class?
- 4Bounds3 marks
x = 176 and y = 17, each correct to the nearest whole number. Work out the upper bound of x - y.
- 5Proof2 marks
In an algebraic proof, how would you write the product of two consecutive integers in terms of an integer n?
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