difficult problem

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

“It’s a notoriously difficult problem for classical computers,” Chow explained.

From Barron's • Jan. 29, 2026

“It’s a difficult problem to solve, and California is kind of solving it in real time.”

From Los Angeles Times • Nov. 26, 2025

If scientists could find a way to create specific mutations to break the protein interaction, it could be a lead on a future vaccine — but it is a difficult problem to solve, Shah said.

From Salon • Feb. 3, 2025

"Growth stunting due to undernutrition is a really difficult problem facing global child health, and the lessons we learn will likely apply to many other conditions as well."

From Science Daily • May 10, 2024

It was a difficult problem, as they did not know how many girls were in existence.

From "The Interrupted Tale" by Maryrose Wood