exam Maths Puzzle Numerical Ability

a stone is dropped from a cliff. In the 4 sec, the sound of the stone striking the ground reaches the top of the cliff. If we assume that the speed of sound is 1100 ft/sec, how high is the cliff?

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Find four consecutive intergers such that twice the sume of the two greater intergers exceeds three times the first by 91? Suppose you buy 1 ticket for $1 out of a lottery of 1,000 tickets where the prize for the one winning ticket is to be $500. What are your expected winnings?