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  2. Gematria - Wikipedia

    en.wikipedia.org/wiki/Gematria

    Table of correspondences from Carl Faulmann's Das Buch der Schrift (1880), showing glyph variants for Phoenician letters and numbers. In numerology, gematria (/ ɡ ə ˈ m eɪ t r i ə /; Hebrew: גמטריא or גימטריה, gimatria, plural גמטראות or גימטריות, gimatriot) [1] is the practice of assigning a numerical value to a name, word or phrase by reading it as a number ...

  3. Alphabetic numeral system - Wikipedia

    en.wikipedia.org/wiki/Alphabetic_numeral_system

    The Greek alphabet has 24 letters; three additional letters had to be incorporated in order to reach 900. Unlike the Greek, the Hebrew alphabet's 22 letters allowed for numerical expression up to 400. The Arabic abjad's 28 consonant signs could represent numbers up to 1000. Ancient Aramaic alphabets had enough letters to reach up to 9000.

  4. Isopsephy - Wikipedia

    en.wikipedia.org/wiki/Isopsephy

    This requires 27 letters, so the 24-letter alphabet was extended by using three obsolete letters: digamma ϝ (also used are stigma ϛ or, in modern Greek, στ) for 6, qoppa ϙ for 90, and sampi ϡ for 900. This alphabetic system operates on the additive principle in which the numeric values of the letters are added together to form the total.

  5. Abjad numerals - Wikipedia, the free encyclopedia

    en.wikipedia.org/wiki/Abjad_numerals

    The Abjad numerals are a decimal numeral system in which the 28 letters of the Arabic alphabet are assigned numerical values. From Wikipedia, the free encyclopedia.

  6. Greek numerals - Wikipedia

    en.wikipedia.org/wiki/Greek_numerals

    This alphabetic system operates on the additive principle in which the numeric values of the letters are added together to obtain the total. For example, 241 was represented as (200 + 40 + 1). (It was not always the case that the numbers ran from highest to lowest: a 4th-century BC inscription at Athens placed the units to the left of the tens.

  7. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    Sets of numbers are typically bold or blackboard bold. The Greek letter forms used in mathematics are often different from those used in Greek-language text: they are designed to be used in isolation, not connected to other letters, and some use variant forms which are not normally used in current Greek typography.

  8. List of mathematical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_constants

    A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]

  9. Letter value - Wikipedia

    en.wikipedia.org/wiki/Letter_value

    Letter value or value of the letter may refer to: Phonetic value of the letter; Numeric value of a letter from the alphabet in some numeric systems; Numeric value of a letter in Scrabble and some other word games