The nom. of the m. and f., which is not extant, may with certainty be givn as þreis.
Note. The definit dual number 'both', ἀμφότεροι, is renderd by bai, which inflects like twai. The extant forms ar nom. m. bai, dat. baim, acc. bans, nom. acc. n. ba.—There occurs also an extended form with the same meaning, its inflection being that of a consonantal substantiv ([§ 117], n. 4): nom. bajôþs, dat. bajôþum.
§ [141]. The numerals from 4 to 19 ar of one gender. Extant ar: fidwôr, 4; fimf, 5; saíhs, 6; sibun, 7; ahtau, 8; niun, 9; taíhun, 10; ainlif ([§ 56], n. 1), 11; twalif, 12; fidwôrtaíhun, 14; fimftaíhun, 15. These numerals ar uzed uninflected, but may take an inflected gen. and dat. according to the i-declension ([§ 99] et seq.). Thus, fidwôr, dat. fidwôrim; niun, gen. niunê; taíhun, dat. taíhunim; ainlif, dat. ainlibim; twalif, gen. twalibê, dat. twalibim.
Note. For fidwôr appears fidur- (s. [§ 24], n. 2) in cpds.: fidurfalþs, fourfold; fidurdôgs, time of four days; fidurragineis, tetrarch. Cp. Beitr., 6, 394; Brgm., III, 11.
§ [142]. The tens from 20 to 60 ar formd by means of the pl. tigjus (< *tigus, a decad), preceded by the units. tigjus inflects regularly like sunus ([§ 104]). The object counted is always givn in the gen.—twai tigjus, 20; *þreis tigjus, 30 (extant in gen. þrijê tigiwê, acc. þrins tiguns), fidwôr tigjus, 40; fimf tigjus, 50; saíhs tigjus, 60.
§ [143]. From 70 to 100 -têhund takes the place of tigjus: sibuntêhund, 70; ahtautêhund, 80; niuntêhund, 90; taíhuntêhund and taíhuntaíhund, 100. The numerals in -têhund ar substantivs which ar as a rule indeclinabl. Onse (Lu. XV, 7) we meet with an inflected gen. sg.; in niuntêhundis jah niunê garaíhtaizê.—Cp. Brgm., III, 40.
§ [144]. The hundreds ar formd by means of the plural of a neuter hund (a hundred). The following ar extant: twa hunda, 200; þrija hunda, 300; fimf hunda, 500; niun hunda, 900.
§ [145]. þûsundi, 1000, is a f. sb. (inflecting like bandi, [§ 96]), with a gen. pl.; several thousands ar exprest by þûsundjôs.—Onse (Ezra II, 14) occurs a n. pl. twa þûsundja. Cp. ahd. gr., § 275. OE. Gr., § 327, and Mahlow, 'Die langen Vocale', p. 98.
The extant thousands ar: twôs þûsundjôs, 2000; .g. þûsundjôs, 3000; fidwôr þûsundjôs, 4000; fimf þûsundjôs, 5000; taíhun þ., 10000; miþ twaim tigum (dat.) þûsundjô (gen.), with 20000.