Higher Plus
15th June 1979
- 1Surds3 marks
Rationalise the denominator of 44/sqrt(11), giving your answer in its simplest form.
- 2Proof2 marks
In an algebraic proof, how would you write the next odd number after 2n + 1 in terms of an integer n?
- 3Direct and Inverse Proportion Depth3 marks
y is inversely proportional to x^2. When x = 2, y = 36. Work out y when x = 3.
- 4The Cosine Rule3 marks
A triangle has sides of 7 cm and 5 cm with an angle of 135° between them. Work out the third side, to 1 decimal place.
- 5Conditional Probability3 marks
A bag holds 6 red, 7 blue and 2 green counters. Two are taken without replacement. Given neither is green, what is the probability both are red?
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