How many digits long could the repeating cycle of a repeating decimal be if the denominator of the rational number is 7?

Question

1. Up to seven digits long
2. Up to six digits long
3. Infinitely long
4. Any finite length

Answer 1

The repeating cycle of a repeating decimal when the denominator is 7 will always have a maximum length of 6 digits.
Hence, the correct answer is option 2: Up to six digits long.