Higher Plus
30th June 1961
- 1Histograms3 marks
A histogram has two bars: one 10 units wide with frequency density 0.4, one 25 units wide with density 0.6. How many values in total?
- 2Surds3 marks
Rationalise the denominator of 18/sqrt(6), giving your answer in its simplest form.
- 3Proof3 marks
Prove that the sum of 3 consecutive integers is always a multiple of 3. State the simplified sum you would use.
- 4Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 3, y = 54. Work out the positive value of x when y = 150.
- 5Proof of the Circle Theorems2 marks
In a circle theorem proof, a step uses the fact that two tangents are drawn to a circle from the same external point. State the reason being quoted.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of June 1961, including the monthly compilation PDF.