Since this number has a terminating decimal expansion, it is a rational number of the form /
and q is of the form 2×5 i.e., the prime factors of q will be either 2 or 5 or both.
(ii) 0.120120012000120000 …
The decimal expansion is neither terminating nor recurring. Therefore, the given number is an irrational number.
Since, it has non-terminating but repeating decimal expansion, it is a rational number and q has factors other than 2 and 5 .