Foundation Plus
2nd March 1978
- 1Probability Trees3 marks
A bag holds 2 red and 6 blue counters. One is taken, replaced, then another is taken. Work out the probability both are red.
- 2Box Plots2 marks
A box plot has minimum 1, lower quartile 10, median 15, upper quartile 24 and maximum 26. Work out the interquartile range.
- 3Prime Factors, HCF and LCM3 marks
Write 54 as a product of its prime factors, using index form.
- 4Drawing Other Graphs: Cubic/Reciprocal2 marks
For the curve y = 24/x, work out y when x = 2, and write down the equation of its vertical asymptote.
- 5Speed and Density2 marks
A block has volume 105 cm^3 and density 4 g/cm^3. Work out its mass.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of March 1978, including the monthly compilation PDF.