David M. Collison's
TriMagic Square
by John R. Hendricks in the Mathematics Teacher
September 2002



The following array of numbers is the world's smallest known trimagic square.

The sum of its rows, columns, and both diagonals are each 9,520.

If you square all the numbers, then the sums are 8,228,000.

If you cube all the numbers, then the sums are 7,946,344,000.

    
1160 1189  539  496  672  695   57   10   11   58  631  654  515  558 1123 1152
 531  560  675  632   43   66 1179 1132 1133 1180    2   25  651  694  494  523
1155 1089  422  379  831  767   92   45   91   44  790  808  403  360 1118 1126
 832  766   99   56 1154 1090  415  368  414  367 1113 1131   80   37  795  803
1106 1135  411  454  716  739   27   74   75   28  757  780  473  430 1143 1172
 409  438  717  760   19   42 1115 1162 1163 1116   60   83  779  736  446  475
 999 1007  192  235  977  995  164  211  163  210 1018  954  173  216 1036  970
 982  990  175  218  994 1012  181  228  180  227 1035  971  158  199 1019  953
 183  191  991 1034  195  213  963 1010  962 1009  236  172  972 1015  220  154
 200  208  974 1017  178  196  980 1027  979 1026  219  155  955  998  237  171
 715  744   20   63 1107 1130  418  465  466  419 1148 1171   82   39  752  781
  18   47 1108 1151  410  433  724  771  772  725  451  474 1170 1127   55   84
 101   35 1153 1110  423  359  823  776  822  775  382  400 1134 1091   64   72
 424  358  830  787  100   36 1146 1099 1145 1098   59   77  811  768  387  395
 667  696   46    3 1165 1188  550  503  504  551 1124 1147   22   65  630  659
  38   67 1168 1125  536  559  686  639  640  687  495  518 1144 1187    1   30



William Walkington notified me that there is a smaller trimagic square of order 12 that was created by Walter Trump in June 2002.   The sums of the rows, columns and diagonals are equal to 870.   The sums of the squares of the rows, columns and diagonals are equal to 83,810.   The sums of the cubes of the rows, columns and diagonals are equal to 9,082,800.

Here is Walter Trump's trimagic suare:




Send any comments or questions to: David Pleacher