Higher
24th December 1977
- 1Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 4, y = 32. Work out y when x = 8.
- 2Vectors3 marks
a is the column vector (1, -4) and b is (5, -2). Work out 2a - 2b as a column vector.
- 3Probability Trees3 marks
1 of 10 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Box Plots2 marks
A box plot has minimum 3, lower quartile 5, median 13, upper quartile 22 and maximum 30. Work out the interquartile range.
- 5Surds2 marks
Write sqrt(98) in the form a sqrt(b), where b is as small as possible.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of December 1977, including the monthly compilation PDF.