Daily Practice
Higher Plus
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17th February 1961
- 1Probability Equation Questions3 marks
A bag holds 2 red and n blue counters. The probability of taking a red is 1/4. Work out n.
- 2Histograms3 marks
A histogram has four 10-wide classes from 0, with frequency densities 2, 0.5, 1, 3. Which class contains the median?
- 3Surds3 marks
Rationalise the denominator of 33/sqrt(3), giving your answer in its simplest form.
- 4Rearranging Harder Formulae3 marks
Make x the subject of 4x + 6 = y(x + 6).
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to sqrt(x). When x = 36, y = 24. Work out y when x = 49.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of February 1961, including the monthly compilation PDF.