Ok so first you want to start off by defining the first number as x. Little tip: a consecutive ODD number will be two apart for the previous odd number. So it would be something like x + 2, x + 4 and so on.
So in this case I would make a key that would look something like this:
1: x
2:x+2
Now we need an equation. We now we need to add number 1 and number two so our equation, would be 2x + 2=168. Then you solve from there.
If you need help with solving this equation you can meeage me!