Tintin and Dangdang were turned into smart countries by their friends' little angels. The king wanted them to stay as advisers and invade honest countries, but they didn't agree, which made the king very angry. The king thought many questions to make them complete. Only one sentence is true.
There are three doors, one with a gun and the other with a wolf. The first door said that the gun was not in Gate 2, the second door said that there was no gun in this door, and the third door said that the gun was in Gate 2. Dangdang walked directly to Gate 2, picked up the gun, walked to Gate 3 and killed the wolf. This makes my reasoning more confident.
This question is only a small part, but it is already very interesting and I like it very much. Because this book combines stories with mathematics, I can read stories and learn mathematics, and there are many problems I have never seen before. I have only learned the tip of the iceberg, so I must study hard.