Commander 39 Posted April 14, 2017 (edited) Will put up later after refinement ! Edited April 14, 2017 by Commander 1 Share this post Link to post Share on other sites

Commander 39 Posted April 21, 2017 The 9x9 Magic Squares use numbers 1 to 81 only once and has the following properties : Each row , column and the two diagonals adds up to 369 and the center most number has to be 41 ! There are many solutions and I give here a sample : We can see that 9x9 Square has nine 3x3 Squares and each of these can be a Magic square with numbers out of the 1 to 81 set. I give below a solution with 9 such 3x3 Squares : It is not possible to have each 3x3 square add up to 123 and the entire row column or diagonal adding to 3x123 = 369 Puzzle : Find the best solution such that each 3x3 Square will add to as close a sum to 123 with the least deviation [less or more] from 123 ! Share this post Link to post Share on other sites

Commander 39 Posted April 23, 2017 Each row , column and the two diagonals adds up to 369 and the center most number has to be 41 ! This Center Number 41 is true for the case of nine 3x3 Magic Squares where 1-81 numbers are placed in such a way as to contain 9 Mini Magic Squares as required in the Puzzle. Share this post Link to post Share on other sites

NimrodTheGoat 26 Posted April 25, 2017 You are using a very nice font. Share this post Link to post Share on other sites

Commander 39 Posted April 25, 2017 You are using a very nice font. Thank you Share this post Link to post Share on other sites

Commander 39 Posted April 26, 2017 Some more inputs : If you take the Sample Magic Square given above formed by the known Generation of Odd numbered Magic Squares with sequential writing of 1,2,3 etc upto 81 as shown it adds up to Magic Sum of 369 as given below. However it can be seen that there are no Mini 3x3 Magic Squares formed within this. There are a set of Mini Diagonals adding upto 123 each as can be seen. Another interesting Solution is given below. Here again there are no 9 Mini 3x3 Magic Squares within but all Mini Diagonals are adding upto 123. Our Current Puzzle is therefore to find a Solution such that each of the 9 Mini 3x3 Squares will add up to a Magic Sum as close to 123 as Possible and the Center Mini Square adding to the Magic Sum 123. As an aside I give here the Famous Ramanujan Magic Square which adds up to a Magic Sum for every row column & diagonal and also many Rectangular 4 numbers adding up to the same Magic Sum of 139. The first Row gives the Birthday of Ramanujan : 22 12 18 87 I set out to find a similar solution for my own Birthday which was quite easy and all the Properties of the Ramanujan Square is fulfilled for a Magic Sum of 101. 139 and 101 are both Prime Numbers. Then I noted that any Birthday can be used to find similar Solution & this is known already ! However I give mine here : Share this post Link to post Share on other sites

Commander 39 Posted May 10, 2017 Has anyone tried out this Problem posed ! Share this post Link to post Share on other sites

Commander 39 Posted June 26, 2017 I am placing this on Twitter & Facebook too ! Be the FIRST in the UNIVERSE to Solve it ! Share this post Link to post Share on other sites

Commander 39 Posted July 6, 2017 (edited) I am giving the Solution to this Magic Square Puzzle in the Spoiler ! For every 3x3 Magic Square the Center Number has to be one third of the Magic Sum. That means for a Magic Sum of 123 the Center number has to be 41 and as we have only one 41 to be used we can not have any two 3x3 MS within 9x9 1-81 MS having 123 as the Magic Sum ! I give here the Best Solution I could find ! Edited July 6, 2017 by Commander Share this post Link to post Share on other sites