難なん問もん題だい

noun

difficult problem; hard question

Refers to a problem or question that is hard to solve or answer, often used in academic or intellectual contexts.

• この数すう学がくの難なん問もん題だいは、誰だれも解とけなかった。

  Nobody could solve this difficult math problem.

• 試し験けんには難なん問もん題だいがいくつか出しゅつ題だいされた。

  Several difficult questions appeared on the exam.