"I have three pairs of shorts"
Translation:Nina kaptura tatu
Kaptura is in the noun class N/N, so it remains the same in singular and plural. Nouns in this noun class have no associated concords/prefixes when it comes to numeral adjectives
the prefix 'ki-' is used with nouns in the noun class Ki/Vi, and is never plural. 'Kiatu kimoja' - 'Viatu vitatu'
The numbers saba, tisa and kumi never take the noun class concord/prefix of the associated noun. Eight chairs would be 'viti vinane'