- The first member is a number.
- These compounds are not typically used to represent a particular number of something, but rather to denote a well-known set or aggragate, or for the purpose of epithet.
- The grammatical number is singular regardless of the the numeral involved.
त्रिलोकम् ("the three worlds.")
दश रथा यस्य सः -> दशरथः ("He who has ten chariots.")