Higher Plus
3rd December 1981
- 1Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^3. When x = 3, y = 108. Work out y when x = 4.
- 2Vectors Proof Questions3 marks
OACB is a parallelogram with vector OA = m and vector OB = a. N is the point dividing AB in the ratio 2 : 1. Write vector ON in terms of m and a.
- 3Probability Equation Questions3 marks
The probability of winning a game is 5/8. A player expects 70 wins. How many games did they play?
- 4Histograms3 marks
On a histogram the bar for 0 < x <= 20 has a frequency density of 1.5. How many values are in that class?
- 5Surds3 marks
Simplify sqrt(18) + sqrt(8), giving your answer in the form a sqrt(b).
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Any date always gives the same five questions, so a sheet can be set again or shared. All of December 1981, including the monthly compilation PDF.