Is 0.12345 irrational

Answer 1

If the decimal of a fraction either terminates or ends with a repeating cycle of digit(s) then it is a rational number;

otherwise it does not terminate nor does it have a repeating cycle of digit(s) at the end and is irrational.

0.12345 terminates as so it rational

If that was repeating, as in 0.123451234512345..., then it is still rational.

Answer 2

Is 0.12345 irrational