Question

the sum of three odd number is 30.

Answer 1

The sum of three odd numbers can not be even. But the sum of three even numbers can be.

Let the one number be x.

So, next number is x+2.
and the third number is x+4.

It is given that their sum is 30.

x + x + 2 + x + 4 = 30
3x + 6 = 30
3x = 24
x = 8.

So, x+2 = 10.
and, x+4 = 12.

Hence, the three numbers are 8, 10 and 12.