Is `(6)/(0)` a rational number?

(1)/(0) is a rational number.

0 is a rational number.

(0)/(1) is a rational number.

(d) (0)/(0) is a rational number.

Express 0.bar(6) as a rational number.

If A and B are two rational number and AB, (A+B) and (A-B) are rational numbers, then (A/B) is (where B ne 0)

Convert bar(0.9) to a rational number.

Express 12.0bar(5) as rational number.

……. Is a rational number between 5 and 6.

Add, the following pair of rational numbers, and show that their addition (sum) is also a rational number : (6)/(11) "and" (-9)/(11)