You must have played 24 points, that is, with 4 cards, you can win by adding, subtracting, multiplying and dividing to get 24. In reality, not any 4 cards have a solution, and it is often hard to judge whether there is a solution when playing. This game uses an algorithm to ensure that every question is solved. You can also enter 4 custom numbers to check the answer. Play a few games a day to keep your mind sharper.

~毅 郑