Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
15th December 2020
- 13d Pythagoras and Trigonometry3 marks
A cuboid measures 11 cm by 12 cm by 5 cm tall. Work out the angle between its longest internal diagonal and the base, to 1 decimal place.
- 2Conditional Probability3 marks
A bag holds 4 red and 7 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 4-wide bar and a 16-wide bar have the same frequency density of 2. How many more values are in the wider class?
- 4Surds3 marks
Expand and simplify (3 + sqrt(6))(3 - sqrt(6)).
- 5Algebraic Fractions3 marks
Write 7/(x + 4) + 5/(x + 6) as a single fraction.
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