This problem is a historical problem. The difficulty is the highest difficulty with 5 stars, and 3,000 people challenged it, but only about 3% of the challengers got the correct answer. That's the correct answer! great.! By solving the highest difficulty problems, you have answered 10 questions in a row so far, so a total of 10 levels. If you answer just one more question correctly, you'll be crowned World's Best, a new world record. So, do you want to challenge? * Quiz Features - Various quizzes with 10 topics and 10 difficulty levels. Thousands of questions and a huge number of quizzes with new ones added all the time. - Quizzes with various, pretty pictures as hints. Quiz with fun phone hints, statistical hints and detailed commentary. - Quizzes that give records and various rewards for quizzes. A quiz that analyzes your brain by providing statistics for each topic. - If you get the highest level, a quiz where you can buy castles in each city in Korea. A quiz where you can become the owner of a castle and show off your skills. * How to play - Look at the problem and select the correct answer from the 4 options presented. - You can also look at the cool photos related to the problem as hints. - If it is difficult, you can use phone hints and statistical hints. - If it's still difficult, you can use short and long explanation hints. - If you answer correctly, you can see other people's chosen answers together. - A long explanation of the problem is really helpful. we are learning - If you click the link in the commentary, you can see the source and more detailed explanation. * Mini game - Make 10: A math game to make 10 by combining numbers - Block Flow: A brain game to fill in the blanks with stacked blocks - Einstein puzzle: Einstein's logic puzzle game * This is not an app that actually gives prizes. thank you ---- Developer contact: 010-0000-0000
