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  2. Mathematical joke - Wikipedia

    en.wikipedia.org/wiki/Mathematical_joke

    Because 31 Oct = 25 Dec. [ 13 ] [ 14 ] The play on words lies in the similarity of the abbreviation for October/ Octal and December/Decimal, and the coincidence that both equal the same number ( 31 8 = 25 10 {\displaystyle 31_{8}=25_{10}} ).

  3. Beware: 40 percent of house guests snoop around - AOL

    www.aol.com/news/2014-06-06-beware-40-percent-of...

    However, The Salonniere survey found that some guests don't limit themselves to just snooping. "Get this one: 14 percent said they have actually gotten frisky, sneaking off to the bedroom or ...

  4. Persistence of a number - Wikipedia

    en.wikipedia.org/wiki/Persistence_of_a_number

    The additive persistence of 2718 is 2: first we find that 2 + 7 + 1 + 8 = 18, and then that 1 + 8 = 9. The multiplicative persistence of 39 is 3, because it takes three steps to reduce 39 to a single digit: 39 → 27 → 14 → 4. Also, 39 is the smallest number of multiplicative persistence 3.

  5. Mathematical coincidence - Wikipedia

    en.wikipedia.org/wiki/Mathematical_coincidence

    The speed of light is (by definition) exactly 299 792 458 m/s, extremely close to 3.0 × 10 8 m/s (300 000 000 m/s). This is a pure coincidence, as the metre was originally defined as 1 / 10 000 000 of the distance between the Earth's pole and equator along the surface at sea level, and the Earth's circumference just happens to be about 2/15 of ...

  6. Opposite ring - Wikipedia

    en.wikipedia.org/wiki/Opposite_ring

    There are 4 different non-self-opposite rings out of the total number of 50 rings with unity [7] having 16 elements (37 [8] commutative and 13 [5] noncommutative). [6] They can be coupled in two pairs of rings opposite to each other in a pair, and necessarily with the same additive group, since an antiisomorphism of rings is an isomorphism of ...

  7. What's the Opposite of 'Yuppie'? Defining a Generation of ...

    www.aol.com/news/2011-10-14-whats-the-opposite...

    Young, upwardly mobile, and professional described the trajectory for many Americans in the 1980s, and caused us to coin the word "Yuppies." But today, in the 2010s, the trajectory is the opposite ...

  8. Almost integer - Wikipedia

    en.wikipedia.org/wiki/Almost_integer

    Ed Pegg Jr. noted that the length d equals (), which is very close to 7 (7.0000000857 ca.) [1] In recreational mathematics, an almost integer (or near-integer) is any number that is not an integer but is very close to one. Almost integers may be considered interesting when they arise in some context in which they are unexpected.

  9. 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]