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Magic Square (Addition)

Fill in the missing numbers so every row, every column, and both diagonals add up to the magic sum shown above each square.

Example
Magic Sum = 69291525192327213117
  1. 1.
    Magic Sum = 6926172335
  2. 2.
    Magic Sum = 30131089
  3. 3.
    Magic Sum = 6026161828
  4. 4.
    Magic Sum = 6315291317
  5. 5.
    Magic Sum = 4216151413
  6. 6.
    Magic Sum = 512513199
  7. 7.
    Magic Sum = 36158169
  8. 8.
    Magic Sum = 102372840
  9. 9.
    Magic Sum = 108273330
  10. 10.
    Magic Sum = 111494340
  11. 11.
    Magic Sum = 150901040
  12. 12.
    Magic Sum = 5111915
  13. 13.
    Magic Sum = 177198999
  14. 14.
    Magic Sum = 63123315
Did You Notice? The center number is special — center × 3 = the magic sum. Also, two numbers on opposite sides of the center always add up to 2 × the center.