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  2. Odd numbers - Wikipedia

    en.wikipedia.org/?title=Odd_numbers&redirect=no

    This page was last edited on 28 September 2007, at 23:06 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.

  3. Parity (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Parity_(mathematics)

    Even and odd numbers have opposite parities, e.g., 22 (even number) and 13 (odd number) have opposite parities. In particular, the parity of zero is even. [2] Any two consecutive integers have opposite parity. A number (i.e., integer) expressed in the decimal numeral system is even or odd according to whether its last digit is even or odd. That ...

  4. 169 (number) - Wikipedia

    en.wikipedia.org/wiki/169_(number)

    169 is an odd number, a composite number, and a deficient number. 169 is a square number: 13 × 13 = 169, and if each number is reversed the equation is still true: 31 × 31 = 961. 144 shares this property: 12 × 12 = 144, 21 × 21 = 441. 169 is one of the few squares to also be a centered hexagonal number. [1]

  5. Collatz conjecture - Wikipedia

    en.wikipedia.org/wiki/Collatz_conjecture

    As an illustration of this, the parity cycle (1 1 0 0 1 1 0 0) and its sub-cycle (1 1 0 0) are associated to the same fraction ⁠ 5 / 7 ⁠ when reduced to lowest terms. In this context, assuming the validity of the Collatz conjecture implies that (1 0) and (0 1) are the only parity cycles generated by positive whole numbers (1 and 2 ...

  6. Descartes number - Wikipedia

    en.wikipedia.org/wiki/Descartes_number

    In number theory, a Descartes number is an odd number which would have been an odd perfect number if one of its composite factors were prime.They are named after René Descartes who observed that the number D = 3 2 ⋅7 2 ⋅11 2 ⋅13 2 ⋅22021 = (3⋅1001) 2 ⋅ (22⋅1001 − 1) = 198585576189 would be an odd perfect number if only 22021 were a prime number, since the sum-of-divisors ...

  7. The Vintage IKEA Furniture That's Now Worth Thousands - AOL

    www.aol.com/lifestyle/vintage-ikea-furniture...

    A $1 storage bin, a $10 desk—you name it, IKEA has it for a low, low price. And while some of the brand's more popular pieces can be on the pricier side, nothing compares to the IKEA vintage market.

  8. What NFL team has played the most Christmas games? - AOL

    www.aol.com/nfl-team-played-most-christmas...

    Houston Texans: 1 (0-1) New York Giants: 1 (0-1) This article originally appeared on USA TODAY: NFL Christmas games: Which team has played the most holiday games? Show comments.

  9. Hindu–Arabic numeral system - Wikipedia

    en.wikipedia.org/wiki/Hindu–Arabic_numeral_system

    The Hindu–Arabic system is designed for positional notation in a decimal system. In a more developed form, positional notation also uses a decimal marker (at first a mark over the ones digit but now more commonly a decimal point or a decimal comma which separates the ones place from the tenths place), and also a symbol for "these digits recur ad infinitum".