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  2. Googolplex - Wikipedia

    en.wikipedia.org/wiki/Googolplex

    If each book had a mass of 100 grams, all of them would have a total mass of 10 93 kilograms. In comparison, Earth 's mass is 5.972 × 10 24 kilograms, the mass of the Milky Way galaxy is estimated at 2.5 × 10 42 kilograms, and the total mass of all the stars in the observable universe is estimated at 2 × 10 52 kg.

  3. Tally marks - Wikipedia

    en.wikipedia.org/wiki/Tally_marks

    Tally marks, also called hash marks, are a form of numeral used for counting. They can be thought of as a unary numeral system. They are most useful in counting or tallying ongoing results, such as the score in a game or sport, as no intermediate results need to be erased or discarded. However, because of the length of large numbers, tallies ...

  4. List of prime numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_prime_numbers

    A prime number (or prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself. By Euclid's theorem , there are an infinite number of prime numbers. Subsets of the prime numbers may be generated with various formulas for primes .

  5. Euler's identity - Wikipedia

    en.wikipedia.org/wiki/Euler's_identity

    In mathematics, Euler's identity[ note 1] (also known as Euler's equation) is the equality where. is pi, the ratio of the circumference of a circle to its diameter. Euler's identity is named after the Swiss mathematician Leonhard Euler. It is a special case of Euler's formula when evaluated for .

  6. Plasmid copy number - Wikipedia

    en.wikipedia.org/wiki/Plasmid_copy_number

    Plasmid copy number. In cellular biology, the plasmid copy number is the number of copies of a given plasmid in a cell. To ensure survival and thus the continued propagation of the plasmid, they must regulate their copy number. If a plasmid has too high of a copy number, they may excessively burden their host by occupying too much cellular ...

  7. List of best-selling video games - Wikipedia

    en.wikipedia.org/wiki/List_of_best-selling_video...

    e. This is a list of video games that have sold the highest number of software units worldwide. The best-selling video game to date is Minecraft, a sandbox game released by Mojang in November 2011 for a wide range of PC, mobile and console platforms, selling more than 300 million copies across all platforms. Grand Theft Auto V and EA's Tetris ...

  8. Devanagari numerals - Wikipedia

    en.wikipedia.org/wiki/Devanagari_numerals

    v. t. e. The Devanagari numeralsare the symbols used to write numbers in the Devanagariscript, predominantly used for northern Indian languages. They are used to write decimalnumbers, instead of the Western Arabic numerals. Table. [edit] Modern.

  9. Cent (currency) - Wikipedia

    en.wikipedia.org/wiki/Cent_(currency)

    Cent (currency) A United States one-cent coin, also known as a penny. The cent is a monetary unit of many national currencies that equals ⁄100 of the basic monetary unit. Etymologically, the word cent derives from the Latin centum meaning ' hundred '. The cent sign is commonly a simple minuscule (lower case) letter c.