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No direct evaluation (Posted on 2015-06-09) Difficulty: 2 of 5
Given that 2^29 is a nine-digit number all of whose digits are distinct, determine which of the ten digits is missing.
Provide your answer without computing the actual number.

Source: SMO contest

No Solution Yet Submitted by Ady TZIDON    
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re(2): Solution | Comment 3 of 4 |
(In reply to re: Solution by Daniel)

Good point.  I considered this but didn't mention it since no power of 2 can be a multiple of 9.


Your post reminds me of this old website http://www.digicc.com/fido/
Try the Fido Puzzle and I'm sure you'll see the similarity.

  Posted by Jer on 2015-06-09 11:52:01
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