I would much, much prefer to have studied equally hard for fewer, more difficult exams.

"I plan to set a difficult exam for my students, but I don't have it ready yet."

What happens when they have to take the science Regents, which is the most difficult exam to pass?

It is not a difficult exam -hardly anyone fails.

Tomorrow afternoon I have a difficult exam and need a clear head.

Granted, the Eagles represent a difficult exam for any quarterback.

The most prestigious university with the most difficult exam is the University of Tokyo.

She was won by Ghatotkacha after passing a difficult exam.

But on June 5, she will be taking an even more difficult exam, in golf.

Sometimes they take their children with them, either as a reward for passing a particularly difficult exam or just for fun.