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  2. Ashte kashte - Wikipedia

    en.wikipedia.org/wiki/Ashte_kashte

    Doubles cannot be passed over by single pieces (whether the player's or the opponent's), and they can only be captured by other doubles. In addition, the two pieces that make up the double may be moved together. The end (centre square) can only be reached by a direct throw.

  3. Addition - Wikipedia

    en.wikipedia.org/wiki/Addition

    Doubles: Adding a number to itself is related to counting by two and to multiplication. Doubles facts form a backbone for many related facts, and students find them relatively easy to grasp. [36] Near-doubles: Sums such as 6 + 7 = 13 can be quickly derived from the doubles fact 6 + 6 = 12 by adding one more, or from 7 + 7 = 14 but subtracting ...

  4. Nim - Wikipedia

    en.wikipedia.org/wiki/Nim

    Nim is a mathematical combinatorial game in which two players take turns removing (or "nimming") objects from distinct heaps or piles. On each turn, a player must remove at least one object, and may remove any number of objects provided they all come from the same heap or pile.

  5. Bughouse chess - Wikipedia

    en.wikipedia.org/wiki/Bughouse_chess

    Bughouse chess (also known as exchange chess, Siamese chess (but not to be confused with Thai chess), tandem chess, transfer chess, double bughouse, doubles chess, cross chess, swap chess or simply bughouse, bugsy, or bug) is a popular chess variant played on two chessboards by four players in teams of two. [1]

  6. Ancient Egyptian multiplication - Wikipedia

    en.wikipedia.org/wiki/Ancient_Egyptian...

    In mathematics, ancient Egyptian multiplication (also known as Egyptian multiplication, Ethiopian multiplication, Russian multiplication, or peasant multiplication), one of two multiplication methods used by scribes, is a systematic method for multiplying two numbers that does not require the multiplication table, only the ability to multiply and divide by 2, and to add.

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  8. Mexico (game) - Wikipedia

    en.wikipedia.org/wiki/Mexico_(game)

    Doubles are ranked extra-numerically (6-6 ranks highest, with 5-5 just below it, and so on down to 1-1), and are worth more than any mixed roll, except for; The 2-1 roll ("Mexico"), which counts for a score of twenty-one. It is the "Mexico" roll after which the game is named, and this is the highest-ranked roll in the game, above 6-6.

  9. The best toys of 2024 - AOL

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    Ages: 3+. A ride-on toy that doubles as a Play-Doh playset? Sign us up. Kids can use the included play kitchen accessories to craft pizzas from Play-Doh, put them in the included pizza box, and ...

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