Hey guys,br Welcome to my channel . You can learn for finding a number of subgroups, subrings, ideal, subfield and positive divisors by using only one formula. Watch video till the end.. I gave 5 more examples for excise.. try to solve.. in case if you get any doubts put a comment into comment box or you cantact me through telegram.. for joining our group click into the below link... br br Telegram link:-br br Wanna to know how to check whether the given number is prime or composite!!!! Click into the below link..