Word: 难题 (nántí) Traditional: 難題 难题 dictionary entry nántí difficult problem Full dictionary entry for 难题 Example sentences using 难题 5 sentences, showing page 1 of 1. 他擅长解答数学难题。 Tā shàncháng jiědá shùxué nántí. He is good at solving complicated mathematical problems. 他正在思考这个难题。 Tā zhèngzài sīkǎo zhège nántí. He's thinking about this difficult problem. 他解决了难题。 Tā jiějuéle nántí. He solved the difficult problem. 我问了她一个难题。 Wǒ wèn le tā yí gè nántí. I asked her a difficult question. 谁解决了这个难题？ Shéi jiějuéle zhège nántí? Who solved the hard problem?