Higher
4th April 1981
- 1Box Plots2 marks
A box plot has minimum 3, lower quartile 8, median 10, upper quartile 17 and maximum 25. Work out the interquartile range.
- 2The Product Rule for Counting3 marks
A code is 3 letters (A to Z) followed by 3 digits (0 to 9), and repeats are allowed. How many codes are possible?
- 3Inequalities on Graphs2 marks
A region is defined by y <= 2x + 1. Should the boundary line be solid or dashed, and why?
- 4Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 4, y = 96. Work out y when x = 5.
- 5Spheres and Cones3 marks
A cone has base radius 8 cm and vertical height 21 cm. Work out its volume, leaving your answer in terms of pi.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of April 1981, including the monthly compilation PDF.