A cardinal number representing the quantity of 50.

पचास

English Usage: There are fifty students in the classroom.

Hindi Usage: कक्षा में पचास छात्र हैं।

A cardinal number representing the quantity of 1.

एक

English Usage: He has one dog.

Hindi Usage: उसके पास एक कुत्ता है।

Describing a quantity or amount that is fifty.

पचास

English Usage: There are fifty reasons to celebrate.

Hindi Usage: जश्न मनाने के लिए पचास कारण हैं।

Describing a single item or unit.

एक

English Usage: She is the one person I can trust.

Hindi Usage: वह एकमात्र व्यक्ति है जिस पर मैं भरोसा कर सकता हूँ।