Daily Practice - Higher Plus
Grades 8-9 - exam-stretch algebra, geometry and reasoning.
11th September 1997
- 13d Pythagoras and Trigonometry3 marks
A cuboid measures 6 cm by 6 cm by 9 cm. Work out the length of the longest diagonal inside it, to 1 decimal place.
- 2Probability Equation Questions3 marks
A bag holds 8 red and n blue counters. The probability of taking a red is 1/2. Work out n.
- 3Histograms2 marks
On a histogram, a 4-wide bar and a 16-wide bar have the same frequency density of 2.5. How many more values are in the wider class?
- 4Surds3 marks
Simplify sqrt(32) + sqrt(18), giving your answer in the form a sqrt(b).
- 5Completing the Square3 marks
Write x^2 - 14x + 10 in the form (x + a)^2 + b.
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