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476. The odd numbers between the even tens

The odd numbers between the even tens are made by prefixing the (accented) unit to the ten to which its value is to be added: but with various irregularities. Thus:

a. eka in 11 becomes ekā, but is elsewhere unchanged;

b. dva becomes everywhere dvā; but in 42–72 and in 92 it is interchangeable with dvi, and in 82 dvi alone is used;

c. for tri is substituted its nom. pl. masc. tráyas; but tri itself is also allowed in 43–73 and in 93, and in 83 tri alone is used;

d. ṣaṣ becomes ṣo in 16, and makes the initial d of daça lingual (199d); elsewhere its final undergoes the regular conversion (226 b, 198 b) to  or  or ; and in 96 the n ofnavati is assimilated to it (199c);

e. aṣṭa becomes aṣṭā (483) in 18–38, and has either form in the succeeding combinations.

f. Thus:

11ékādaça31ékatriṅçat61ékaṣaṣṭi81ékāçīti
12dvā́daça32dvā́triṅçat62dvā́ṣaṣṭi82dvyàçīti
dvíṣaṣṭi
13tráyodaça33tráyastriṅçat63tráyaḥṣaṣṭi83tryàçīti
tríṣaṣṭi
14cáturdaça34cátustriṅçat64cátuḥṣaṣṭi84cáturaçīti
15páñcadaça35páñcatriṅçat65páñcaṣaṣṭi85páñcāçīti
16ṣóḍaça36ṣáṭtriṅçat66ṣáṭṣaṣṭi86ṣáḍaçīti
17saptádaça37saptátriṅçat67saptáṣaṣṭi87saptā́çīti
18aṣṭā́daça38aṣṭā́triṅçat68aṣṭáṣaṣṭi88aṣṭā́çīti
aṣṭā́ṣaṣṭi
19návadaça39návatriṅçat69návaṣaṣṭi89návāçīti

g. The numbers 21–29 are made like those for 31–39; the numbers 41–49, 51–59, 71–79, and 91–99 are made like those for 61–69.

h. The forms made with dvā and trayas are more usual than those with dvi and tri, which are hardly to be quoted from the older literature (V. and Br.). The forms made with aṣṭā (instead of aṣṭa) are alone found in the older literature (483), and are usual in the later.