Answer 1

Like this?

https://code.sololearn.com/WX6l7FY68gas/?ref=app

Answer 2

To me the text appears centered...

text-align centers horizontally on the line. Are you trying to center vertically in the container?

Answer 3

One way could be using flex-box on #txt:

display: flex;
align-items: center;
justify-content: center;

Answer 4

Then try:
position: center;

Answer 5

try it!
align="center"
or
style="text-align:center"