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2. Barcode - Wikipedia

   en.wikipedia.org/wiki/Barcode

   A barcode or bar code is a method of representing data in a visual, machine-readable form. Initially, barcodes represented data by varying the widths, spacings and sizes of parallel lines. These barcodes, now commonly referred to as linear or one-dimensional (1D), can be scanned by special optical scanners, called barcode readers, of which ...

3. Proportional representation - Wikipedia

   en.wikipedia.org/wiki/Proportional_representation

   Economics portal. Mathematics portal. v. t. e. Proportional representation (PR) refers to any type of electoral system under which subgroups of an electorate are reflected proportionately in the elected body. [1] The concept applies mainly to political divisions (political parties) among voters. The essence of such systems is that all votes ...

4. Bertrand's box paradox - Wikipedia

   en.wikipedia.org/wiki/Bertrand's_box_paradox

   Bertrand's box paradox is a veridical paradox in elementary probability theory. It was first posed by Joseph Bertrand in his 1889 work Calcul des Probabilités. There are three boxes: a box containing two gold coins, a box containing two silver coins, a box containing one gold coin and one silver coin. A coin withdrawn at random from the three ...

5. 40–40 club - Wikipedia

   en.wikipedia.org/wiki/40–40_club

   Alfonso Soriano, the third most recent player to join the 40–40 club, commemorated the occasion in 2006 by retrieving the bag from second base after his 40th steal. In Major League Baseball (MLB), the 40–40 club is the group of batters, currently six, who have collected 40 home runs and 40 stolen bases in a single season. Few professional ...

6. 40 (number) - Wikipedia

   en.wikipedia.org/wiki/40_(number)

   40 is the smallest number with exactly nine solutions to the equation Euler's totient function (for values 41, 55, 75, 82, 88, 100, 110, 132, and 150 of ). Adding up some subsets of the divisors of 40 (e.g., 1, 4, 5, 10, and 20) gives 40; hence, 40 is the ninth semiperfect number. [7] 40 is also the ninth refactorable number.

7. Svoboda (political party) - Wikipedia

   en.wikipedia.org/wiki/Svoboda_(political_party)

   The non-participation of the Congress of Ukrainian Nationalists meant it was the only far-right party to participate. [40] In autumn 2009, Svoboda joined the Alliance of European National Movements as the only organisation from outside the European Union. [2] That year the party claimed to have 15,000 members. [40] A Svoboda rally in Kyiv in 2009