Solutions to Puzzle 405: 7x7 Sum Sudoku 7413562 4736521 6524713 2145763 1256347 6257314 4175236 3671245 3642175 7413652 5731624 5324176 2367451 1562437 2716543 5346721 7653412 3154267 4321675 6217345 1547236 4735612 5274361 1672453 6135724 2563174 3462157 7421536