MBA Exam

A vessel contains 100 gallons of pure milk . 20 gallons of the contents of this vessel are removed and replaced with water. This operation is repeated 5 times. What is the ratio of milk to water in the resulting mixture?

1) 2516:1325
2) 1024:3125
3) 1024:2101
4) 1:5
5) none of the above

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MBA Other Question

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(a,b)is an ordered pair such that a, b are two two digit numbers. when a interchange it's digit becomes b. How many ordered pair are there such that (a-b) is a perfect square except zero ?

1) 3
2) 10
3) 13
4) none of these
How many even integers n, where100<= n <= 200, are divisible neither by seven nor by nine?

1) 40
2) 37
3) 38
4) 36