Pairwise coprime numbers in a 3 x 3 board












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Find all the ways of placing all the digits 1 to 9 in the cells of a 3 x 3 board in such a manner that the seven three-digit numbers that can be read horizontally (from left to right), vertically (top to bottom), and diagonally (top left to bottom right) are pairwise relatively prime (i.e. they hay no common divisor greater than 1), but none is a prime itself.










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  • $begingroup$
    Are you certain that there is a solution to this puzzle? Just out of curiousity
    $endgroup$
    – Brandon_J
    49 mins ago


















0












$begingroup$


Find all the ways of placing all the digits 1 to 9 in the cells of a 3 x 3 board in such a manner that the seven three-digit numbers that can be read horizontally (from left to right), vertically (top to bottom), and diagonally (top left to bottom right) are pairwise relatively prime (i.e. they hay no common divisor greater than 1), but none is a prime itself.










share|improve this question









$endgroup$












  • $begingroup$
    Are you certain that there is a solution to this puzzle? Just out of curiousity
    $endgroup$
    – Brandon_J
    49 mins ago
















0












0








0





$begingroup$


Find all the ways of placing all the digits 1 to 9 in the cells of a 3 x 3 board in such a manner that the seven three-digit numbers that can be read horizontally (from left to right), vertically (top to bottom), and diagonally (top left to bottom right) are pairwise relatively prime (i.e. they hay no common divisor greater than 1), but none is a prime itself.










share|improve this question









$endgroup$




Find all the ways of placing all the digits 1 to 9 in the cells of a 3 x 3 board in such a manner that the seven three-digit numbers that can be read horizontally (from left to right), vertically (top to bottom), and diagonally (top left to bottom right) are pairwise relatively prime (i.e. they hay no common divisor greater than 1), but none is a prime itself.







computer-puzzle arithmetic






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asked 51 mins ago









Bernardo Recamán SantosBernardo Recamán Santos

2,5261345




2,5261345












  • $begingroup$
    Are you certain that there is a solution to this puzzle? Just out of curiousity
    $endgroup$
    – Brandon_J
    49 mins ago




















  • $begingroup$
    Are you certain that there is a solution to this puzzle? Just out of curiousity
    $endgroup$
    – Brandon_J
    49 mins ago


















$begingroup$
Are you certain that there is a solution to this puzzle? Just out of curiousity
$endgroup$
– Brandon_J
49 mins ago






$begingroup$
Are you certain that there is a solution to this puzzle? Just out of curiousity
$endgroup$
– Brandon_J
49 mins ago












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