Use your brain!! Are there any geniuses here? There is a Japanese riddle that appeared in 2013 and was presented at a university, and only 30% of the students were able to answer it correctly. Afterward, this riddle was considered a measure to determine the intelligence level of anyone who answers it, so it was considered that anyone who could answer it correctly is indeed smart. At first, the riddle may seem simple, but it can take minutes and hours to answer it correctly, and it requires intense focus and considering possibilities: The riddle: There was a con artist who entered a bookstore to buy a book worth “10 dollars” and he had a fake “100 $” bill. He presented the “100” fake bill to the shop owner, and the shop owner did not notice that it was not real. So, the shop owner took it, but he was unable to break it down (meaning he did not have smaller denominations), so he went to the nearby restaurant owner to break it for him into smaller denominations.. The shop owner then gave the book and the remaining hundred dollars, which is “90 dollars,” to the con artist, who took it and left. Half an hour later, the restaurant owner came back to the bookstore owner to return the “100 dollars” and told him that it was not real.. The bookstore owner took it without saying a word because this was his mistake since he did not make sure it was real.. He returned another real 100 dollars to the restaurant owner. The question: How much did the bookstore owner lose? "Be different in your intelligence"$$PEPE