一六銀行[ichirokuginkou] pawnshop
一六勝負[ichirokushoubu] gambling
五臓六腑[gozouroppu] the internal organs
三十六計[sanjuurokkei] the 36 (ancient Chinese military) strategies (of which the last resort was said to be beating a retreat)
三面六臂[sanmenroppi] rush of business

四六時中[shirokujichuu] around the clock
十六[juuroku] 16
十六音符[juurokuonpu] 16th note
十六夜[izayoi] sixteen-day-old moon
上方贅六[kamigatazeiroku] people of the Kyoto area

黄道十二宮[koudoujuunikyuu] twelve signs of the zodiac
丸十[marujuu] cross in a circle
五十音[gojuuon] the Japanese syllabary
五十音順[gojuuonjun] the syllabary order
五十三次[gojuusantsugi] the 53 Toukaidou stages

五十年祭[gojuunensai] jubilee
五十歩百歩[gojuppohyappo] six of one and a half dozen of the other
五十路[isoji] age fifty
三十戸[sanjikko] thirty houses
三十三所[sanjuusansho] any of a number of sets of thirty-three holy places enshrining Avalokitesvara (esp. those comprising a popular pilgrimage in the Kinki region)

卦算[keisan] paperweight
八卦[hakke] eight trigrams
八卦掌[hakkeshou] eight trigrams palm
本卦帰り[honkegaeri] reaching age of 60
有卦[uke] streak of good luck

六十四卦[rokujuushike] the 64 hexagrams (of the Book of Changes)
卦体糞悪い[kettakusowarui] extremely vexing
卦算冠[keisankanmuri] kanji "kettle lid" radical (radical 8)
卦辞[kaji] commentary (on any of the 64 hexagrams in the Book of Changes)

まっ四角[masshikaku] square
一天四海[ittenshikai] the world
下四半期[shimoshihanki] last quarter (of the year)
弦楽四重奏曲[gengakushijuusoukyoku] string quartet
再三再四[saisansaishi] repeatedly

三寒四温[sankanshion] alternation of three cold and four warm days
四つ[yottsu] four
四つんばい[yotsunbai] (crawl) on all fours
四つ角[yotsukado] four corners
四つ足[yotsuashi] four-footed (animal)