12 22 15 9 21 11 19 12 34 17 32 14 13 18 10 21

58

12 22 15 9 58 21 11 19 12 63 34 17 32 14 97 13 18 10 21 62 80 68 76 56 76

12 22 15 9 = 58 21 11 19 12 = 63 34 17 32 14 = 97

80 68 76 56

Nine consecutive integers are placed in the nine squares of a 3x3 grid. If every column, every row, and every diagonal adds up to the same number n and the middle number is 8 what is n?

Can you arrange the numbers from 1 to 9 on a tic tac toe board in a manner that the numbers in each row, column and diagonal adds up to 15. Remember that you have to use all the 9 numbers and thus you cannot repeat.

Fill the missing number, numbers are 1 to 9, numbers in each row add up to the right, numbers in each column add up to the bottom, numbers in each diagonal add up to the right?