On the August 20 episode of 'Night Goblin', F.T. Island's Hongki and NU'EST's JR battled it out in a test of their English skills.

SEE ALSO: NU'EST's JR and Park Sung Kwang to guest on 'Knowing Brothers'

The two were asked what an electric fan (seonpoongki in Korean) was called in English. JR started off by guessing, "Air conditioner?" which made the cast giggle. At that moment, Lee Soo Geun caught Hongki laughing and so he said, "Hongki, you tell us what it's actually called in English." Hongki looked around nervously and then guessed, "Propeller?" which made the whole cast laugh once more.

The quiz continued as they were now asked if they knew what Han River (Han Kang in Korean) was called in English. The two idols' eyes shook nervously as Hongki guessed, "One River?" The members were flustered by these wild guesses and eventually called the whole thing to an end. However, right before they moved on, JR bragged that he used to be better in Math than English which caused Jung Hyung Don to ask, "What's the root of 16?" JR shyly responded, "Hyung...I forgot". 

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