He made a math problem.

It is difficult to find the answer to this big question.

This minor question is too difficult to solve.

I was able to answer all questions correctly.

This classic question is to test whether you are truly a quiz champion or not.

This is really a good problem, isn't it?

The dangerous dragon burned down the village.

We need to break out of this vicious cycle.

He called that country the axis of evil.

Due to bad weather, our picnic was cancelled.