Question

Find three different irrational numbers between the rational numbers 5/7 and 9/11

Answer 1

Do the long divison of 5/7 and 9/11
that is
5/7=0.714285 bar
9/11=0.81 bar

Now you can write as many as irrational numbers between them

for example
0.712345689
0.72345689012
0.8123456785
and these are he different irrational nos between 5/7 and 9/11

Hope this helps.
Good luck.