For a prime p other than 2 or 5, what is the upper bound on the period…

Question

For a prime p other than 2 or 5, what is the upper bound on the period length of the decimal expansion of 1/p?

Accepted Answer

D. p - 1

The period length of the repeating decimal expansion of 1/p can never exceed p - 1.

Answer

p + 1

Answer

p / 2

Answer

2p - 1

For a prime p other than 2 or 5, what is the upper bound on the period length of the decimal expansion of 1/p?