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  2. Divisibility rule - Wikipedia

    en.wikipedia.org/wiki/Divisibility_rule

    The original number is divisible by 7 if and only if the number obtained using this procedure is divisible by 7. For example, the number 371: 37 − (2×1) = 37 − 2 = 35; 3 − (2 × 5) = 3 − 10 = −7; thus, since −7 is divisible by 7, 371 is divisible by 7. Similarly a number of the form 10x + y is divisible by 7 if and only if x + 5y ...

  3. 1001 (number) - Wikipedia

    en.wikipedia.org/wiki/1001_(number)

    The test number is divisible by 7, 11 or 13 iff the result of the summation is divisible by 7, 11 or 13 respectively. [2] [3] Example: Number under test, N = 22 872 563 219 Sum of odd groups, S o = 219 + 872 = 1091 Sum of even groups, S e = 563 + 22 = 585 Total sum, S = S o - S e = 1091 - 585 = 506 506 = 46 × 11

  4. Apartment No. 9 - Wikipedia

    en.wikipedia.org/wiki/Apartment_No._9

    The song was issued as a single in 1966 and it became Austin's first to chart on the Billboard Hot Country Singles chart, reaching number 21 in 1966. "Apartment #9" would be one of several charting singles by Austin over the next several years. Future charting singles included "Cupid's Last Arrow" (1967) and "This Song Is Just for You" (1967). [1]

  5. Harshad number - Wikipedia

    en.wikipedia.org/wiki/Harshad_number

    The number 18 is a harshad number in base 10, because the sum of the digits 1 and 8 is 9, and 18 is divisible by 9.; The Hardy–Ramanujan number (1729) is a harshad number in base 10, since it is divisible by 19, the sum of its digits (1729 = 19 × 91).

  6. Beechwood 4-5789 - Wikipedia

    en.wikipedia.org/wiki/Beechwood_4-5789

    The track also reached the R&B Top Ten where it achieved double A-side status with "Beechwood 4-5789" reaching number 7 and the flip "Someday, Someway" number 8; [1] the latter track was a ballad from the writing-and-production team of Brian Holland, Lamont Dozier and Freddie Gorman and featured Berry Gordy Jr.'s wife Raynoma Liles as organist.

  7. Lateralus (song) - Wikipedia

    en.wikipedia.org/wiki/Lateralus_(song)

    The song is known for its distinct time signatures and corresponding lyrical patterns. The time signatures of the chorus of the song change from 9/8 to 8/8 to 7/8; as drummer Danny Carey says, "It was originally titled 9-8-7. For the time signatures. Then it turned out that 987 was the 16th number of the Fibonacci sequence. So that was cool." [2]

  8. Weird number - Wikipedia

    en.wikipedia.org/wiki/Weird_number

    In number theory, a weird number is a natural number that is abundant but not semiperfect. [ 1 ] [ 2 ] In other words, the sum of the proper divisors ( divisors including 1 but not itself) of the number is greater than the number, but no subset of those divisors sums to the number itself.

  9. 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".