exam Maths Puzzle Numerical Ability

In a race, the first prize will be $5 greater than the second and the second will be $4 greater than the third. The total prize money is $52. Find each prize.

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exam Other Question

A drain can empty a swimming pool in 8 days. A second drain can empty the same pool in 4 days. In how much time will the two drains working together empty the pool? If D=st and s=300,000km t=2.5 second, how far is the moon if it takes 2.5 sec to travel to the earth and back(in km)?