MBA Exam

Find d remainder when 50^51^52 is divided by 11.explain also.....

1) 6
2) 4
3) 7
4) 3

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MBA Other Question

there are 2 pockets, each containing 3 coins of diff. denominations which are in AP and the total value of coins in each pocket is Rs 21. the common diff. of the first set of coins is greater than that of the second set by 1 and the product of first set is the product of the second set as 8 to 9. find the value of the coin of largest denominations among 6 coins?

1) 8
2) 9
3) 10
4) 11
Let A ={ x where x is a prime no.and x < 30}.the no.of differnt rational numbers numerator and denominator belong to A is

1) 90
2) 180
3) 91
4) none of these,.

plz explain...........