For the most part, he has not had serious problems.

You've got some serious problems to work out in your head.

But the chance of a serious problem from a test is low.

The high cost of going to college became an even more serious problem.

I am 18 years old and face a serious problem.

They said the board was wrong to see such things as serious problems so early in the process.

People who don't know are at higher risk of serious medical problems and early death.

And I wouldn't ask you if we didn't have a real serious problem here.

These questions are still serious problems in every country today.

He is 68 years old, but was not known to have had serious medical problems.