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50 - Digit Number (Posted on 2003-11-15) Difficulty: 3 of 5
A number of 50 digits has all its digits equal to 1 except the 26th digit. If the number is divisible by 13, then find the digit in the 26th place.

See The Solution Submitted by Ravi Raja    
Rating: 3.3333 (6 votes)

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re(3): A similar problem but perhaps a bit trickier | Comment 15 of 39 |
(In reply to re(2): A similar problem but perhaps a bit trickier by Kirk)

Of course, I meant 'x' is getting bigger and bigger if we take 7-x=-22 and 7-x=-33 etc. My argument still applies though, but I apologise for the error! Oh, and "hand" should read "handy"!
  Posted by Kirk on 2003-11-20 17:17:18

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