IMO Shortlist 1994 problem N7
Dodao/la:
arhiva2. travnja 2012. A wobbly number is a positive integer whose digits are alternately zero and non-zero with the last digit non-zero (for example, 201). Find all positive integers which do not divide any wobbly number.
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A wobbly number is a positive integer whose digits are alternately zero and non-zero with the last digit non-zero (for example, 201). Find all positive integers which do not divide any wobbly number.
Izvor: Međunarodna matematička olimpijada, shortlist 1994
Školjka 
