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Productive Numbers (Posted on 2013-05-26) Difficulty: 3 of 5
Find all possible 9-digit numbers using precisely nine distinct digits from 0 to 9 such that each pair of consecutive digits is the product of two single-digit numbers.

For example, 2 and 1 can appear next to each other since 3*7=21. However, 2 and 6 cannot appear next to each other since 26 is the product only of 2 and 13 (and 1 and 26), and each pair of factors contains a number that is not a single-digit number.

*** None of the 9-digit numbers can contain any leading zero.

No Solution Yet Submitted by K Sengupta    
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Comments: ( Back to comment list | You must be logged in to post comments.)
Some Thoughts WITH ZERO | Comment 3 of 6 |

728163540 OR 725481630 , MAYBE MORE... 


  Posted by Ady TZIDON on 2013-05-26 13:16:16
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