1. 十五   fifteen   thirty   fifty   ninety   Hint Hint       2. 五十   two   fifty   ten   five   Hint       3. 十二   zero   thousand   twelve   fifty   Hint       4. 九十   four   ninety   ten   one   Hint       5. 四   eighty   four   thousand   thirteen   Hint       6. 五   seventy   seven   ten   five   Hint       7. 七十   twelve   fifteen   seventy   eight   Hint