Question

use 1 to 9 numbers and gried to make total 15 Horizontally and vertically lines you can not repeat the number.​

Answer 1

Step-by-step explanation:

The number 15 is called the magic number of the 3x3 square. You can also achieve 15, if you add the middle number 5 three times. The odd numbers 1,3,7, and 9 occur twice in the reductions, the even numbers 2,4,6,8 three times and the number 5 once.