When to use problem in Korean
Korean: 문제[ mun-je ]

When to use it
문제 means a problem. In school, it often means a question or exercise in a workbook, homework, or a test. You can also use it for a difficulty in daily life, like a problem with a computer or a ticket.
Example sentences
수학 문제를 다 풀었어요.
I solved all the math problems.
이 문제는 정말 어려워요.
This problem is very difficult.
집 인터넷에 문제가 있어요.
There is a problem with the home internet.
선생님, 이 문제를 다시 설명해 주세요.
Teacher, please explain this problem again.
이 가방은 문제가 있어서 싸요.
This bag is cheap because it has a problem.
기차표에 문제가 있어요.
There is a problem with the train ticket.