

My grandpa is ninety this year.
[ˈmaɪ ˈɡræmˌpɑ ˈɪz ˈnaɪnti ˈðɪs ˈjɪr.]
The train journey takes ninety minutes.
[ðə ˈtreɪn ˈdʒɜrni ˈteɪks ˈnaɪnti ˈmɪnəts.]
Is this coat really ninety dollars?
[ˈɪz ˈðɪs ˈkoʊt ˈriəli ˈnaɪnti ˈdɑlərz?]
"ninety" is in the lesson "Big numbers" (Level 4), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,375 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.