Higher
2nd December 1972
- 1Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 3, y = 54. Work out y when x = 2.
- 2SOHCAHTOA (Trigonometry)3 marks
A right-angled triangle has a hypotenuse of 14 cm and an angle of 39°. Work out the side adjacent to that angle, to 1 decimal place.
- 3Probability Trees3 marks
2 of 5 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 7, median 16, upper quartile 21 and maximum 29. Work out the interquartile range.
- 5Surds2 marks
Write sqrt(45) 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 1972, including the monthly compilation PDF.