How To Write 4 In Between 5?

Is it possible to write 4 in between 5? Is it a math quiz? Is it difficult to answer? Or not!

It is a question made without a particular reason! Perhaps out of amusement, boredom, or simple, out of jest! It is a question though, all the same, and it needs an answer.

80% of the responders, could not find the correct answer! Or any answer at all, for what’s matter. Could not make the “significant” link, would provide them with a base of reference. It is not math, or rocket science. It just needs...