indeclinable words and the words āsanna 'near', adūra 'near', adhika 'more' and the words called saṃkhyā (Numerals) are compounded with another saṃkhyā word, when the sense is that of a numeral or saṃkhyā The compound is bahuvrīhī,
Thus उपदशाः 5.4.73 'those who are near ten i.e. nine or eleven.' Similarly उपविंशः 'nineteen or twenty-one' 6.4.142. So also आसन्नदशाः 'nine or eleven.' अदूरदशाः 'nine or eleven.' अधिकदशाः 'eleven.'
So also two 'numerals' may be compounded; as, द्वित्राः 'two or three.' द्विदशाः 'twenty.'
Why do we say with a numeral'? Observe पंच ब्राह्मणाः 'five Brahmanas.'
Why do we say 'with an Indeclinable &c'? Witness ब्राह्मणाः पंच. Why do we say 'when denoting a numeral'? Observc अधिका विंशतिर्गवाम्' of cows more than twenty.',