Higher Plus
21st June 1972
- 1Bounds3 marks
A rectangle is 30 cm by 23 cm, each correct to the nearest cm. Work out the upper bound of its area.
- 2Proof2 marks
In an algebraic proof, how would you write the product of two consecutive integers in terms of an integer n?
- 3Velocity Time Graphs2 marks
A train slows steadily from 31 m/s to rest in 4 seconds. Work out its deceleration.
- 4The Cosine Rule3 marks
A triangle has sides of 16 cm and 7 cm with an angle of 87° between them. Work out the third side, to 1 decimal place.
- 5Conditional Probability3 marks
A bag holds 4 red, 4 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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