We're sure you'll watch the next episode of 'Running Man' because it will feature guests Kyuhyun, Yenny, John Park,�and Rap Monster. But on top of that, the 'Running Man' members and guests took an IQ test! We know how fast and cunning they can be in games, but have you ever wondered what their IQs are?

As they were about to take the IQ test, HaHa complained, "Why are we doing this in the morning? I'd actually rather play a game where I have to use my body," making the set laugh.�Among the fixed members, guess who had the highest IQ? Everyone on set was surprised when it was none other than Yoo Jae Suk!

The IQ expert announced, "All sections of Yoo Jae Suk's [brain] are evenly balanced and well-developed."�Even Yoo Jae Suk was surprised as he exclaimed, "Me?"

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To find out everyone's exact IQ, you'll have to watch the September 20 episode at 6:10pm KST!