How the word "じゅうさん（十三）" is translated into English
娘はじゅうさん歳です。
じゅうさん番のバスで行きます。
クラスはじゅうさん人ですか？
"じゅうさん（十三）" is in the lesson "Numbers" (Level 3), along with 19 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.
