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2. Divisibility rule - Wikipedia

   en.wikipedia.org/wiki/Divisibility_rule

   In fact, this rule for prime divisors besides 2 and 5 is really a rule for divisibility by any integer relatively prime to 10 (including 33 and 39; see the table below). This is why the last divisibility condition in the tables above and below for any number relatively prime to 10 has the same kind of form (add or subtract some multiple of the ...

3. 1001 (number) - Wikipedia

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

   Two properties of 1001 are the basis of a divisibility test for 7, 11 and 13. The method is along the same lines as the divisibility rule for 11 using the property 10 ≡ -1 (mod 11). The two properties of 1001 are 1001 = 7 × 11 × 13 in prime factors 10 3 ≡ -1 (mod 1001) The method simultaneously tests for divisibility by any of the factors ...

4. List of Martin Gardner Mathematical Games columns - Wikipedia

   en.wikipedia.org/wiki/List_of_Martin_Gardner...

   On the theory of probability and the practice of gambling 1962 Jan: An adventure in hyperspace at the Church of the Fourth Dimension: 1962 Feb: A clutch of diverting problems 1962 Mar: How to build a game-learning machine and teach it to play and win 1962 Apr: About three types of spirals and how to construct them 1962 May

5. Parity (mathematics) - Wikipedia

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

   The following laws can be verified using the properties of divisibility. They are a special case of rules in modular arithmetic, and are commonly used to check if an equality is likely to be correct by testing the parity of each side. As with ordinary arithmetic, multiplication and addition are commutative and associative in modulo 2 arithmetic ...

6. Divisibility (ring theory) - Wikipedia

   en.wikipedia.org/wiki/Divisibility_(ring_theory)

   Divisibility is a useful concept for the analysis of the structure of commutative rings because of its relationship with the ideal structure of such rings. Definition [ edit ]

7. Division (mathematics) - Wikipedia

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

   The simplest way of viewing division is in terms of quotition and partition: from the quotition perspective, 20 / 5 means the number of 5s that must be added to get 20. In terms of partition, 20 / 5 means the size of each of 5 parts into which a set of size 20 is divided.

8. These Are the Thanksgiving Foods You Should Skip if You ... - AOL

   www.aol.com/thanksgiving-foods-skip-ozempic...

   There are a few foods you may want to skip on Thanksgiving if you're taking a GLP-1 medication such as Ozempic, dietician Kylie Bensley, founder of the women’s nutrition company, Sulinu, tells ...

9. Digit sum - Wikipedia

   en.wikipedia.org/wiki/Digit_sum

   Digit sums and digital roots can be used for quick divisibility tests: a natural number is divisible by 3 or 9 if and only if its digit sum (or digital root) is divisible by 3 or 9, respectively. For divisibility by 9, this test is called the rule of nines and is the basis of the casting out nines technique for checking calculations.