Higher Plus
12th July 1975
- 1Bounds3 marks
A car covers 400 m (to the nearest 10 m) in 6 s (to the nearest second). Work out the lower bound of its speed, to 2 decimal places.
- 2Algebraic Fractions3 marks
Simplify (x^2 - 5x + 6)/(x - 3).
- 3Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^3. When x = 2, y = 32. Work out y when x = 4.
- 4Finding the Area of Any Triangle3 marks
A triangle has sides of 16 cm and 10 cm and an area of 56.57 cm^2. Work out the acute angle between those two sides, to the nearest degree.
- 5Probability Equation Questions3 marks
A bag holds 6 counters, r of them red. Two are taken without replacement and P(both red) = 1/15. Work out r.
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