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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. Fizz buzz - Wikipedia

    en.wikipedia.org/wiki/Fizz_buzz

    Fizz buzz is a group word game for children to teach them about division. [1] Players take turns to count incrementally, replacing any number divisible by three with the word "fizz", and any number divisible by five with the word "buzz", and any number divisible by both three and five with the word "fizzbuzz".

  4. 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 ...

  5. Division algorithm - Wikipedia

    en.wikipedia.org/wiki/Division_algorithm

    Long division is the standard algorithm used for pen-and-paper division of multi-digit numbers expressed in decimal notation. It shifts gradually from the left to the right end of the dividend, subtracting the largest possible multiple of the divisor (at the digit level) at each stage; the multiples then become the digits of the quotient, and the final difference is then the remainder.

  6. Sanity check - Wikipedia

    en.wikipedia.org/wiki/Sanity_check

    In multiplication, 918 × 155 is not 142,135 since 918 is divisible by three but 142,135 is not (digits add up to 16, not a multiple of three). Also, the product must end in the same digit as the product of end-digits: 8 × 5 = 40, but 142,135 does not end in "0" like "40", while the correct answer does: 918 × 155 = 142,290.

  7. Arithmetic - Wikipedia

    en.wikipedia.org/wiki/Arithmetic

    For instance, if the number π is rounded to 4 decimal places, the result is 3.142 because the following digit is a 5, so 3.142 is closer to π than 3.141. [107] These methods allow computers to efficiently perform approximate calculations on real numbers.

  8. Today's Wordle Answer for #1021 on Friday, April 5, 2024 - AOL

    www.aol.com/todays-wordle-answer-1021-friday...

    Hints and the solution for today's Wordle on Friday, April 5.

  9. Euler's theorem - Wikipedia

    en.wikipedia.org/wiki/Euler's_theorem

    2. There is also a direct proof: [4] [5] Let R = {x 1, x 2, ... , x φ(n)} be a reduced residue system (mod n) and let a be any integer coprime to n. The proof hinges on the fundamental fact that multiplication by a permutes the x i: in other words if ax j ≡ ax k (mod n) then j = k.

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