Sci Fi Short story about the smartest people taken to another planet

There is a short story I read many years ago which must be from the 60s or before. It follows a young man who is selected by aliens with other humans as the smartest and taken to another planet or moon for training and education. He doesn't really fit in with the others and you think he just isn't cut out for it or selected in error. The ending is a surprise in that it turns out that he is actually much smarter and in a different way than the others and is just what the aliens have been trying to find and select for all along. I may have some of these details wrong but the main thing is the treatment of what you thought was not smart to be smarter than ever. Thank you for your time!