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POHow to find how many permutations of number(string S) without leading zeroes are divisible by 11, without using brute-force?
 

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  1. POHow to find how many permutations of number(string S) without leading zeroes are divisible by 11, without using brute-force?
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    1. PTQuestion
    1. USVictor Nascimento
    1. USVictor Nascimento
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      1. POHow to find how many permutations of number(string S) without leading zeroes are divisible by 11, without using brute-force?
      1. USthermite
      1. VTFavorite
    2. VO
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      1. POHow to find how many permutations of number(string S) without leading zeroes are divisible by 11, without using brute-force?
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      1. VTUpMod
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      1. POHow to find how many permutations of number(string S) without leading zeroes are divisible by 11, without using brute-force?
      1. USelias
      1. VTFavorite
    1. COWell, it ends in a 1, there's one digit less to do.
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      1. POHow to find how many permutations of number(string S) without leading zeroes are divisible by 11, without using brute-force?
      1. USchris
    2. COHint: 100 equals 1 (mod 11).
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      1. POHow to find how many permutations of number(string S) without leading zeroes are divisible by 11, without using brute-force?
      1. USaschepler
    3. COWhat? 1 % 11 != 100. 1 % 11 == 1. [Proof](http://www.wolframalpha.com/input/?i=1+%25+11)
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      1. POHow to find how many permutations of number(string S) without leading zeroes are divisible by 11, without using brute-force?
      1. USBrian Gradin
 

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