1. The unexpected question from the interviewer seemed to nonplus the job applicant.
2. The complex math problem nonplussed the entire class.
3. His calm demeanor in the face of danger nonplussed his friends.
4. The sudden change in plans nonplussed the event organizers.
5. She was nonplussed by the negative feedback on her presentation.
6. The difficult decision ahead was enough to nonplus even the most experienced team leader.
7. The cryptic message left by the mysterious stranger nonplussed the detective.
8. The strange behavior of the new student nonplussed his classmates.
9. The professor's unconventional teaching style nonplussed the students at first.
10. The intricate puzzle nonplussed the seasoned crossword solver.