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Thread: Automorphic numbers

  1. #1
    Junior Member
    Join Date
    Feb 2007

    Automorphic numbers

    WAP to find whether the entire no. is automorphic. (ie the no. which if we make squre of it, its last digit should be same as the no. itself. ex: 5*5=25,6*6=36,.. are automorphic. while 3*3=9,7*7=49,.. are not)

  2. #2
    Contributing Member
    Join Date
    Sep 2006

    Re: Automorphic numbers

    Its easy to find an number is automorphic or not....Get the last digit of the number. Check if the number is equal to (0 or 1 or 5 or 6 ). If yes then it is an automorphic number otherwise it is not.


  3. #3
    Junior Member
    Join Date
    Feb 2007

    Re: Automorphic numbers

    take the given number x.

    compute y = x*x

    compute z = y mod 10

    if x == z then yse
    else no

    The mod operator basically returns the remainder. If mod 10 returns the number that we intitally used to square... you get the idea

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