Here are some key examples:
* The Philosopher's Stone: The central conflict revolves around the threat of Lord Voldemort attempting to steal the Stone to regain his power.
* The Forbidden Forest: They face danger from a three-headed dog guarding the Stone and various other creatures.
* The Chess Game: They have to overcome a giant chessboard where the pieces are life-sized and dangerous.
* The Trapdoors: They encounter numerous traps within the castle, including the infamous "Devil's Snare."
* The Mirror of Erised: The Mirror of Erised (desire spelled backwards) tempts Harry with the image of his parents, which almost causes him to lose focus on the true task at hand.
* Professor Quirrell: They discover that the seemingly harmless Professor Quirrell is actually possessed by Voldemort.
* The Final Confrontation: Harry faces off against Quirrell and Voldemort, risking his own life to protect the Stone.
These are just a few examples of the many problems they faced. Throughout the book, Harry, Ron, and Hermione demonstrate courage, resourcefulness, and loyalty in overcoming these obstacles.