The 22 by itself doesn't have a separate meaning. The phrase "Catch 22" was derived from the book write by Joseph Heller. The phrase basically means if you can do it, you really can't do it, and if...
2.2 means two point two. It is a number between 2 and 3, closer to 2. You could think of it like two and two tenths (2 + 2/10). This is the same thing as two and one fifth (2 + 1/5), or eleven fifths...
Catch 22? look at the number 22 if you look at it backwards it is still the same, it could have been called catch 11, catch 33 etc. but I guess catch 22 is more catchy! for example, if someone you...