1 votes 1 votes For all integers $n>0, \: \: 7^{6n} - 6^{6n}$ is divisible by $13$ $128$ $549$ None of these Quantitative Aptitude cat2002 quantitative-aptitude number-systems + – go_editor asked Mar 2, 2016 edited Apr 9, 2022 by Lakshman Bhaiya go_editor 13.8k points 298 views answer comment Share See all 0 reply Please log in or register to add a comment.