Let$C$_{$k$}$(p)$denote the group of the$k$-th powers (mod$p$)$p$a prime with ($k, p$−1)>1. A new elementary result for the least$k$-th power non-residue is given and the result is applied to finding a new elementary bound for the maximum number of consecutuve integers in any coset of$C$_{$k$}$(p)$.