Magic square

 

4	3	8
9	5	1
2	7	6

 

 

To add to 15:

1+6+8

3+5+7

2+4+9

2+6+7

2+5+8

 

First fill in 2,5,8 as the diagonal

Then fill in 6 and 7 at the bottom. since 7+8 exceeds the limit, use 6 for the column with 8

Using the two numbers present, fill in the rest. It works.

 

		8
	5
2	7	6