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Old 2017-06-29, 07:14   #5
MattcAnderson's Avatar
"Matthew Anderson"
Dec 2010
Oregon, USA

117310 Posts
Smile thanks

Hi Mersenne Forum,

Thank you to all the responses to this thread.
I see Greathouse's reasoning for a 6 in the bottom row of the top right 3 by 3 grid.

Now this one should be easy.

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