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Puzzle K-1.  SUDOKU

Fill in the matrix so that every row, every column, and every 3x3 box, contains the numbers 1 through 9.  This also means that no repetition of numbers is allowed in each column, row, or 3X3 box.

 3 6 2 9
 2 3 7
 7 9 6
 7 4 6 2
 6 7 4
 2 3 6
 5 3 7
 2 5 1
 7 6 5

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Bits and Beyond ...

MARSENNE'S PRIME

Prime numbers are positive integers greater than one with no factors other than one and themselves.  They include 2, 3, 5, 7, 11, 13, 17 ...  With the exception of two, all the prime numbers are odd numbers.  Prime numbers of the form 2n-1 are called Marsenne's Prime.  Marin Mersenne (1588-1648) was a French monk who showed that the numbers 2n-1 were prime for n=2, 3, 5, 6, 13, 17, 19, 31, 67, 127 and 257.

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