| | binary digit; octal digit; decimal digit; significant digit, significant figure; zero, 0, nought, cipher, cypher; one, 1, I, ace, single, unity; two, 2, II, deuce; three, 3, III, trio, threesome, tierce, leash, troika, triad, trine, trinity, ternary, ternion, triplet, tercet, terzetto, trey, deuce-ace; four, 4, IV, tetrad, quatern, quaternion, quaternary, quaternity, quartet, quadruplet, foursome, Little Joe; five, 5, V, cinque, quint, quintet, fivesome, quintuplet, pentad, fin, Phoebe, Little Phoebe; six, 6, VI, sixer, sise, Captain Hicks, half a dozen, sextet, sestet, sextuplet, hexad; seven, 7, VII, sevener, heptad, septet; eight, 8, VIII, eighter, eighter from Decatur, octad, ogdoad, octonary, octet; nine, 9, IX, niner, Nina from Carolina, ennead |