MBA Exam

(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

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MBA Other Question

The digits of a four digit number form an arithmetic progression, not necessarily in the same order. How many such four digit numbers are possible if the arithmetic mean of all the digits is an integer?

1) 72
2) 84
3) 90
4) 96
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