Daily Practice
Higher Plus
← All tiers
17th October 1972
- 1Probability Equation Questions3 marks
A bag holds 6 red and n blue counters. The probability of taking a red is 3/4. Work out n.
- 2Histograms3 marks
A histogram has four 10-wide classes from 0, with frequency densities 3, 1, 2, 0.5. Which class contains the median?
- 3Surds3 marks
Expand and simplify (6 + sqrt(10))(6 - sqrt(10)).
- 4Completing the Square3 marks
Write x^2 + 12x - 5 in the form (x + a)^2 + b.
- 5Direct and Inverse Proportion Depth3 marks
y is inversely proportional to x^2. When x = 5, y = 108. Work out y when x = 6.
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