Higher Plus
14th October 1981
- 1Bounds3 marks
A rectangle is 27 cm by 18 cm, each correct to the nearest cm. Work out the upper bound of its area.
- 2Iteration3 marks
Use the iteration x(n+1) = cube root of (12x(n) + 3) with x(0) = 5. Work out x(1) to 3 decimal places.
- 3Direct and Inverse Proportion Depth3 marks
y is directly proportional to sqrt(x). When x = 25, y = 35. Work out y when x = 49.
- 4Vectors Proof Questions3 marks
OACB is a parallelogram with vector OA = b and vector OB = a. P is the point dividing AB in the ratio 1 : 2. Write vector OP in terms of b and a.
- 5Probability Equation Questions3 marks
The probability of winning a game is 1/2. A player expects 4 wins. How many games did they play?
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