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  2. 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 ...

  3. Division (mathematics) - Wikipedia

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

    In terms of partition, 20 / 5 means the size of each of 5 parts into which a set of size 20 is divided. For example, 20 apples divide into five groups of four apples, meaning that "twenty divided by five is equal to four". This is denoted as 20 / 5 = 4, or ⁠ 20 / 5 ⁠ = 4. [2] In the example, 20 is the dividend, 5 is the divisor, and 4 is ...

  4. Multiplication - Wikipedia

    en.wikipedia.org/wiki/Multiplication

    For example, since 4 multiplied by 3 equals 12, 12 divided by 3 equals 4. Indeed, multiplication by 3, followed by division by 3, yields the original number. The division of a number other than 0 by itself equals 1. Several mathematical concepts expand upon the fundamental idea of multiplication.

  5. Long division - Wikipedia

    en.wikipedia.org/wiki/Long_division

    3 37)1260257 111 Note carefully which place-value column these digits are written into. The 3 in the quotient goes in the same column (ten-thousands place) as the 6 in the dividend 1260257, which is the same column as the last digit of 111. The 111 is then subtracted from the line above, ignoring all digits to the right:

  6. Division by infinity - Wikipedia

    en.wikipedia.org/wiki/Division_by_infinity

    The hyperbola = /.As approaches ∞, approaches 0.. In mathematics, division by infinity is division where the divisor (denominator) is ∞.In ordinary arithmetic, this does not have a well-defined meaning, since ∞ is a mathematical concept that does not correspond to a specific number, and moreover, there is no nonzero real number that, when added to itself an infinite number of times ...

  7. 1000 (number) - Wikipedia

    en.wikipedia.org/wiki/1000_(number)

    1331 = 11 3, centered heptagonal number, [107] forms a Ruth–Aaron pair with 1330 under second definition. This is the only non-trivial cube of the form x 2 + x − 1, for x = 36. 1332 = pronic number [90] 1333 = 37 2 - 37 + 1 = H 37 (the 37th Hogben number) [203] 1334 = maximal number of regions the plane is divided into by drawing 37 circles ...

  8. No, 'basics' do not cost $11,000 a year more than they did 18 ...

    www.aol.com/no-basics-not-cost-11-160004106.html

    The claim: Basic expenses cost a family $11,000 more a year than they did 18 months ago. An Oct. 16 post on Threads (direct link, archive link) makes a claim about the supposed cost of inflation ...

  9. English numerals - Wikipedia

    en.wikipedia.org/wiki/English_numerals

    3.1416 is "three point one four one six" 99.3 is "ninety-nine point three"; or "ninety-nine and three tenths" (U.S., occasionally). In English the decimal point was originally printed in the center of the line (0·002), but with the advent of the typewriter it was placed at the bottom of the line, so that a single key could be used as a full ...