Puzzle # 2

Say! my digits are three,

But just what can they be?

Take a third of my first

From a half of my third

And a minus, right here

Would, of course, be absurd.

Now add twice my middle

To continue the riddle.

If you figured it right,

Then you can`t have seven.

For, believe me, I know

That you must have eleven.

There`s no catch in this,

But don`t take it amiss

When I add one thing more,

Just to make it quite clear.

You should know that a five

Is no part of me here.