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  2. Elementary arithmetic - Wikipedia

    en.wikipedia.org/wiki/Elementary_arithmetic

    A subtraction problem such as is solved by borrowing a 10 from the tens place to add to the ones place in order to facilitate the subtraction. Subtracting 9 from 6 involves borrowing a 10 from the tens place, making the problem into +. This is indicated by crossing out the 8, writing a 7 above it, and writing a 1 above the 6.

  3. Divisibility rule - Wikipedia

    en.wikipedia.org/wiki/Divisibility_rule

    Take each digit of the number (371) in reverse order (173), multiplying them successively by the digits 1, 3, 2, 6, 4, 5, repeating with this sequence of multipliers as long as necessary (1, 3, 2, 6, 4, 5, 1, 3, 2, 6, 4, 5, ...), and adding the products (1×1 + 7×3 + 3×2 = 1 + 21 + 6 = 28). The original number is divisible by 7 if and only if ...

  4. Prophets of Deceit - Wikipedia

    en.wikipedia.org/wiki/Prophets_of_Deceit

    Prophets of Deceit (A Study of the Techniques of the American Agitator) is a 1949 book co-written by the German sociologist Leo Löwenthal and the Polish-Jewish scholar Norbert Guterman. The authors analyze and define media appeals specific to American pro- fascist and anti-Semite agitators of the 1940s, such as the application of psychosocial ...

  5. Division by zero - Wikipedia

    en.wikipedia.org/wiki/Division_by_zero

    Zero divided by a negative or positive number is either zero or is expressed as a fraction with zero as numerator and the finite quantity as denominator. Zero divided by zero is zero. In 830, Mahāvīra unsuccessfully tried to correct the mistake Brahmagupta made in his book Ganita Sara Samgraha: "A number remains unchanged when divided by zero ...

  6. Turn (angle) - Wikipedia

    en.wikipedia.org/wiki/Turn_(angle)

    The turn (symbol tr or pla) is a unit of plane angle measurement that is the measure of a complete angle—the angle subtended by a complete circle at its center. One turn is equal to 2π radians, 360 degrees or 400 gradians.

  7. Studio 54 - Wikipedia

    en.wikipedia.org/wiki/Studio_54

    According to CBS documents, Studio 54's proscenium arch measures 27 feet 0 inches (8.23 m) high and 43 feet 8 inches (13.31 m) wide. There was a fly system 58 feet (18 m) above the stage. [ 8 ] Backstage were six dressing rooms, as well as a 15-by-40-foot (4.6 by 12.2 m) rehearsal space at stage left.

  8. Marshalltown, Iowa - Wikipedia

    en.wikipedia.org/wiki/Marshalltown,_Iowa

    The median age in the city was 36.7 years. 29.0% of the residents were under the age of 20; 6.3% were between the ages of 20 and 24; 24.0% were from 25 and 44; 22.2% were from 45 and 64; and 18.6% were 65 years of age or older.

  9. March First Movement - Wikipedia

    en.wikipedia.org/wiki/March_First_Movement

    This led to the first international article on the movement being published there on March 4. [11] News of the protests first reached the United States on March 10, via a cablegram sent by Korean independence activists in Shanghai to San Francisco. [11] By the following day, the story appeared in American papers.