Higher
14th July 1980
- 1Cumulative Frequency2 marks
A cumulative frequency graph is drawn for 204 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 2The Product Rule for Counting3 marks
A code is 2 letters (A to Z) followed by 2 digits (0 to 9), and repeats are allowed. How many codes are possible?
- 3Drawing Other Graphs: Cubic/Reciprocal2 marks
For the curve y = -60/x, work out y when x = -5, and write down the equation of its vertical asymptote.
- 4Repeated Percentage Change3 marks
A price rises by 25% and then falls by 10%. Work out the overall percentage change, to 2 decimal places.
- 5Similar Shapes (Area and Volume)3 marks
Two similar solids have lengths in the ratio 1 : 2. The larger has a volume of 88 cm^3. Work out the volume of the smaller.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of July 1980, including the monthly compilation PDF.