Read the dictionary definition of problem. All definitions for this word.
1. a source of difficulty
1. one trouble after another delayed the job
2. what's the problem?
2. a question raised for consideration or solution
1. our homework consisted of ten problems to solve
3. a state of difficulty that needs to be resolved
1. she and her husband are having problems
2. it is always a job to contact him
3. urban problems such as traffic congestion and smog