Here are some simple math problems for you guys: Wonder Girls=5-1+1-1+1 Super Junior=12+1-1 After School=5+1-1+2+1 Do these numbers sound familiar to you? It should because the numbers correlate to the number of members for current active idol groups. Idol groups have been experiencing a lot of member changes due to new members and members that decide to leave the groups. People are so confused these days because they don't know who's who in the idol groups. It's hard to memorize all the names and faces of the members. It's even hard these days to keep up with the number of members. Some are getting fed up because the whole idol group phenomenon is something they can't even enjoy. The first reason why it's become a challenge to keep up with idol groups is because there are so members in each group. SNSD has nine members, Super Junior had 13, ZE:A has nine as well and After School has eight. The list really goes on. Another big issue is member changes. Wonder Girls started out with five members but then member HyunA left, Yubin joined, Sunmi left and then finally Hye Lim joined. Super Junior began with 13 members but Kibum seems to have vanished from the public eye, Hangeng left and Kangin is now serving in the army. After School is one of the most confusing group in recent times. They started with only five members but had UEE joining them in the middle. Then, Soyoung left, with Raina and Nana were added as replacements. Randomly, another member, Lizzy joined and they're even looking for an extra member at the moment. Even with 2PM, ex-leader Jay Park left and is now a solo artist. Recently in T-ara, they added a new member too. Do you think it's hard to keep up with idol members? S: Sports Seoul