Here is a 6 x 6 Magic Square with Magic-Total 111
1)Draw a 6 x 6 empty square.
2)Draw a bold line after the third square, Horizontally and vertically.
3).Now the 6 x 6 magic square will be divided into four 3 x 3 Magic squares.
4) Start filling the 3 x 3 magic square on the top left with numbers 1 to 9. and top right from 19 to 27, bottom left with 28 to 36 and bottom right with 10 to 18.
5) Now exchange the numbers 8,5,4 from the top left 3 x 3 square to the bottommost left 3 x 3 squares with the numbers 35, 32, 31 and vice versa.
6) Your 6 x 6 magic square is ready. All vertical, Horizontal and both diagonal totals are equal ( 111) .

As per the instructions given in step no. 4, the numbers 35,32,31 will be available in the down magic square in place of 8,5,4
The FINAL FORMAT OF 6 X 6 IS GIVEN ABOVE. This will be after exchanging numbers 8,5,4 and replacee them by 35,32,31 and vice versa
Magic squares sharps our mind
Quick solution
Nice perfect method