First, it doesn't need to be a world problem. Think small. We solve problems every day! Use an example of a small-- but important-- "problem" that affected you, your family, your friends, your employer.
Examples:
Chat with our AI personalities
a problem is a conflict or a question and its solved by thinking how u would do fix the problem
The math problem 4.6 x 0.7 can be solved by multiplying. The answer to this problem would be 3.22. This math problem can easily be solved by elementary students and higher.
Problems of morality. Premarital sex of teens would be solved that way then.
A problem you cant think of.
Sorry to be unhelpful, but it's still a problem.