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50 - Digit Number II (Posted on 2005-05-13) Difficulty: 2 of 5
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?

See The Solution Submitted by Dustin    
Rating: 2.8000 (5 votes)

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re(2): A systematic approach | Comment 7 of 12 |
(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
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