Foundation Plus
29th April 1967
- 1Probability Trees3 marks
A bag holds 4 red and 4 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 7, lower quartile 15, median 25, upper quartile 35 and maximum 39. Work out the interquartile range.
- 3Prime Factors, HCF and LCM3 marks
Write 126 as a product of its prime factors, using index form.
- 4Drawing Other Graphs: Cubic/Reciprocal2 marks
For the curve y = -25/x, work out y when x = 5, and write down the equation of its vertical asymptote.
- 5Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 6, y = 72. Work out y when x = 13.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of April 1967, including the monthly compilation PDF.