complete the magic square given below,


complete the magic square given below, so that the sum of the numbers in each row or in each column or along each diagonal is 15.


Taking the diagonal that starts with 6:

$6+5+x=15 \Rightarrow x=4$

Now, taking the first row:

$6+1+x=15 \Rightarrow x=8$

Taking the last column:

$8+x+4=15 \Rightarrow x=3$

Taking the second column:

$1+5+x=15 \Rightarrow x=9$

Taking the second row:

$x+5+3=15 \Rightarrow x=7$

Taking the diagonal that begins with 8:

$8+5+x=15 \Rightarrow x=2$

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