MBA Exam

Two different two digit numbers are written beside each other such that the larger number is written on the left .when the absolute difference of the two numbers is subtracted from the four-digit number so formed ,the number obtained is 5481.what is the sum of the two two-digit numbers???

1) 70
2) 71
3) 72
4) 73

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MBA Other Question
The number of roots of the equation x + | x2 - 1 | = k, where k is a real constant is/are

1) 4 for k = 6/5
2) 3 for k = 5/4
3) 2 for -1 < k < 1
4) All of these
 what is the remainder 52^60 divided by 31

1) 21
2) 01
3) 35
4) non of these