Ordinal numbers
Los números ordinales

| first / 1st | primero |
| second / 2nd | segundo |
| third / 3rd | tercero |
| fourth / 4th | cuarto |
| fifth / 5th | quinto |
| sixth / 6th | sexto |
| seventh / 7th | séptimo |
| eighth / 8th | octavo |
| ninth / 9th | noveno |
| tenth / 10th | décimo |
| eleventh / 11th | undécimo |
| twelfth / 12th | duodécimo |
| thirteenth | decimotercero |
| fourteenth | decimocuarto |
| fifteenth | decimoquinto |
| sixteenth | decimosexto |
| seventeenth | decimoséptimo |
| eighteenth | decimoctavo |
| nineteenth | decimonoveno |
| twentieth / 20th | vigésimo |
| twenty-first / 21st | vigésimo primero |
| twenty-second / 22nd | vigésimo segundo |
| twenty-third | vigésimo tercero |
| twenty-fourth | vigésimo cuarto |
| twenty-fifth | vigésimo quinto |
| twenty-sixth | vigésimo sexto |
| twenty-seventh | vigésimo séptimo |
| twenty-eighth | vigésimo octavo |
| twenty-ninth | vigésimo noveno |
| thirtieth | trigésimo |
| thirty-first | trigésimo primero |
Exercise
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