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Words, grammatical forms and meanings linked to the ontology.

repdigit en · NOUN

Pronunciation

  • (Southern-England) audio
  • /ˈɹɛpˌdɪd͡ʒɪt/ (General-American, Received-Pronunciation)

Etymology

Blend of rep(eated) + digit.

Meanings

  1. (qualifier:recreational mathematics) A number composed only of one or more occurrences of one specific digit and no other digit.
    • A positive with repeated digit is called a repdigit, for example 222, 55555, and all repunits are repdigits. 2005, James J[oseph] Tattersall, “Modular Arithmetic”, in Elementary Number Theory in Nine Chapters, 2nd edition, Cambridge: Cambridge University Press, →ISBN, section 5.6 (Supplementary Exercises), paragraph 14, page 193:
    • Repdigit Triangular Numbers [article title] 1975, David W. Ballew, Ronald C. Weger, “Repdigit Triangular Numbers”, in Journal of Recreational Mathematics, volume 8, number 2, Farmingdale, N.Y.: Baywood Publishing Co., →ISSN, →OCLC, pages 96–98:
    • Is there any system of notation in which there is a repdigit aa such that (aa)²#61;ccdd, with c#61;a-1 and d#61;c-1? 1980 January, Murray S[eymour] Klamkin, quoting Charles W. Trigg, “The Olympiad Corner: 11”, in Crux Mathematicorum, volume 6, number 1, Ottawa, Ont.: Canadian Mathematical Society, →ISSN, →OCLC, page 16:
    • Here is another palindromic magic square that has the added property of having main diagonals containing eight repeating "repdigits": 222, 333, 444, 555, 666, 777, 888, and 999. The magic sum is 2442. 2002, Clifford A[lan] Pickover, “Gallery I: Squares, Cubes, and Tesseracts”, in The Zen of Magic Squares, Circles, and Stars: An Exhibition of Surprising Structures across Dimensions, Princeton, N.J.; Woodstock, Oxfordshire: Princeton University Press, →ISBN, page 284:

Forms

SpellingFeaturesLabelsSource
repdigits Number=Plur lexicographic

Hyponyms

repunit

Relateds

repetend · repeating decimal

Translations (11)

it numero a cifra ripetuta (number composed of one digit) · pl repdigit (number composed of one digit) · eo repdigito (number composed of one digit) · bg репдиджит (number composed of one digit) · ko 렙디지트 (number composed of one digit) · ja ぞろ目 (number composed of one digit) · fr nombre uniforme (number composed of one digit) · ru репди́гиты (number composed of one digit) · ta ஒற்றெண் (number composed of one digit) · cmn 純位數 /纯位数 (number composed of one digit) · de Schnapszahl (number composed of one digit)