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  2. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    3. Also used in place of \ for denoting the set-theoretic complement; see \ in § Set theory. × (multiplication sign) 1. In elementary arithmetic, denotes multiplication, and is read as times; for example, 3 × 2. 2. In geometry and linear algebra, denotes the cross product. 3.

  3. List of prime numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_prime_numbers

    This is a list of articles about 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.

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  5. 3 - Wikipedia

    en.wikipedia.org/wiki/3

    When doing quick estimates, 3 is a rough approximation of π, 3.1415..., and a very rough approximation of e, 2.71828... 3 is the first Mersenne prime , as well as the second Mersenne prime exponent and the second double Mersenne prime exponent , for 7 and 127 , respectively. 3 is also the first of five known Fermat primes , which include 5, 17 ...

  6. 15 Vintage Puzzles Worth a Puzzling Fortune - AOL

    www.aol.com/finance/15-vintage-puzzles-worth...

    Vintage jigsaw puzzles are not just nostalgic entertainment; they also double as lucrative investments with impressive price tags. Certain puzzles — especially those stemming from limited ...

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  8. Coat of arms of Serbia - Wikipedia

    en.wikipedia.org/wiki/Coat_of_arms_of_Serbia

    The coat of arms of the Republic of Serbia (Serbian: грб Републике Србије, romanized: grb Republike Srbije) consists of two main heraldic symbols which represent the identity of the Serbian state and Serbian people across the centuries: the Serbian eagle (a silver double-headed eagle adopted from the Nemanjić dynasty) and the Serbian cross (or cross with firesteels).

  9. E. C. “Pete” Aldridge, Jr. - Pay Pals - The Huffington Post

    data.huffingtonpost.com/paypals/e-c-pete-aldridge-jr

    From January 2008 to April 2011, if you bought shares in companies when E. C. “Pete” Aldridge, Jr. joined the board, and sold them when he left, you would have a -25.3 percent return on your investment, compared to a -7.3 percent return from the S&P 500.