Question

find eight rational numbers between 6/5 and 7/5​

Answer 1

6/5 and 7/5 can be written as 12/10 and 14/10 and one rational can be inserted, i.e 13/10.

Again, write 6/5 and 7/5 as 18/15 and 21/15 and you can insert two rational numbers 19/15 and 20/15 or 4/3.

Further, write 6/5 and 7/5 as 24/20 and 28/20 and you can insert rational numbers as 25/20 or 5/4, 26/20 or 13/10, and 27/20.

So you can introduce more and more rational numbers by increasing the denominator by having higher multipliers.