• Each row and column should comprise of three 3-digit primes.
• In each of the second, fifth and eighth rows and in each of the the second, fifth and eighth columns, the three 3-digit primes, in SuDoDu fashion, every digit 1 to 9 will be used once.
• In all other rows and columns digits may be repeated.
• All 3-digit primes should be distinct.

More than one solution may exist.

Dej Mar,

I really liked this problem, but tackled it the wrong way the first time.

Here is the solution I found.

5 5 7 2 2 9 5 9 9

7 6 9 5 4 1 2 8 3

1 3 7 7 1 9 3 3 7

6 1 9 4 3 3 1 5 1

5 4 7 1 6 3 8 2 9

3 9 7 9 7 1 1 1 3

8 8 3 2 8 1 4 6 3

8 2 1 6 5 9 3 4 7

1 7 3 9 9 1 1 7 9

Edited on June 4, 2007, 4:48 pm

Posted by Leming on 2007-06-04 16:41:35