Higher Plus
27th June 1980
- 1Surds3 marks
Rationalise the denominator of 24/sqrt(2), giving your answer in its simplest form.
- 2The Nth Term of a Quadratic Sequence2 marks
A quadratic sequence starts 13, 29, 55, 91. Work out the second difference, and the coefficient of n^2.
- 3Velocity Time Graphs2 marks
A train slows steadily from 28 m/s to rest in 10 seconds. Work out its deceleration.
- 4The Cosine Rule3 marks
A triangle has sides 10 cm, 12 cm and 9 cm. Work out the angle opposite the 10 cm side, to 1 decimal place.
- 5Probability Equation Questions3 marks
A bag holds 4 red and n blue counters. The probability of taking a red is 1/2. Work out n.
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