I am thinking of a fifty-digit number divisible by 239, of which, each digit is the same, except the ones digit. What is the ones digit?

(In reply to re: A systematic approach by Justin)

i dont get your justification justin

i think 2 is a prime number right ???

now 11......1 mod  2 does not give zero but 22.......2 mod 2 does give a zero

please explain what was your point in saying  "  because 239 is prime, and therefore no number can be added an integer amount of times to eliminate the remainder."

Posted by phi on 2005-06-22 08:17:53