Higher Plus
1st September 1971
- 1Bounds3 marks
A rectangle is 27 cm by 20 cm, each correct to the nearest cm. Work out the upper bound of its area.
- 2Algebraic Fractions3 marks
Write 3/(x - 4) + 2/(x - 3) as a single fraction.
- 3Direct and Inverse Proportion Depth3 marks
y is directly proportional to sqrt(x). When x = 25, y = 20. Work out y when x = 36.
- 4Finding the Area of Any Triangle3 marks
A triangle has sides of 6 cm and 16 cm and an area of 48.00 cm^2. Work out the acute angle between those two sides, to the nearest degree.
- 5Probability Equation Questions3 marks
A bag holds 11 counters, r of them red. Two are taken without replacement and P(both red) = 3/55. Work out r.
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