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- elementary number theory - What is meant by evenly divisible . . .
"What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20?" Is it different from divisible?
- Does ⋮ mean is divisible by in mathematical notation?
Does ⋮ mean "is divisible by" in mathematical notation? Ask Question Asked 5 years ago Modified 2 years, 1 month ago
- How to know a number is divisible by a given number without using a . . .
For example, how do we decide intuitively that $11172686$ is divisible (or not) by $7$ or $13$? Moreover, I am interesting in knowing a simple rules or condition that a number is divisible by a given number without using a calculator?
- If $a$ is divisible by $b$ is represented as $b\mid a$ then negation?
In what I've seen the most common notation for "does not divide" has a short slash through the vertical line, as in @StephenDonovan's comment, but usually slightly higher up The big slash, as in Daniel Wainfleet's comment is less common, but, as he notes, it results from the common TeX code \not
- Proof of the divisibility rule of 11. - Mathematics Stack Exchange
We know, A number is divisible by $11$ if the difference of the sum of the digits in the odd places and the sum of the digits in the even places is divisible by $11$ For example, Let's consider
- Divisibility of 9 trick: why does it work? [duplicate]
I've been wondering ever since I learned about the divisibility of nine trick Add up the sum of the digits If the sum is a multiple of nine, the entire number is divisible by nine If the sum is too big to tell, repeat with the sum It's amazing But my question is: why does this work? Does it have something to do with the fact that 10 - 9 = 1?
- Divisibility by 7 - Mathematics Stack Exchange
The best way to test if a number is divisible by any other number is by deducting the number n times and check whether the remainder is divisible by n for example 861-7n 7
- Prove that $a^ {2n} -b^ {2n}$ is divisible by $a+b$ [duplicate]
2 This question already has answers here: Why is $a^n - b^n$ divisible by $a-b$? (8 answers)
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