noun🔗Share수수께끼, 어려운 문제A difficult problem or puzzle."The math problem was a real brainteaser, and it took me an hour to solve it. "수학 문제는 정말 어려운 문제였고, 그걸 푸는 데 한 시간이 걸렸다.mindentertainmentlogicgameabilitymathChat with AIVocabulary GamePractice Reading
