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Divide the number by thirteen. If the answer comes out even with no remainder, the number is divisible by thirteen.

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Q: How can you tell if a number is divisible by 13?

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If it's divisible by 3 and 4, it's divisible by 12.

Not evenly. 585 is divisible by 3, 5, and 13.

It's not. The quotient isn't a whole number.

The foolproof way is to divide 4 into it. If the answer is a whole number, it's divisible by 4. You can also tell by looking at it. If the last two digits are a multiple of 4, like 24 or 80, the whole number is divisible by 4.

39 is not divisible by 2, since it is odd. Looking at the next highest prime number 3, we see that it is divisible, so we divide by three until it is no longer divisible by 3: 39/3 = 13 13 is also prime, thus 3*13 is the prime factorization.

Related questions

A number is divisible by 13 if it is a multiple of 13. In other words, 13 times a number results in a big number that is divisible by 13.

13 and all its multiples are divisible by 13.

Some positive numbers are divisible by 13, but not all of them.

The number 70 is divisible by 13, but not evenly.

Every number divisible by 10 is divisible by 5.

If it ends with an even number then it is divisible by 2

The number 143 is divisible by 1, 11, 13, and 143.

No 13 is not divisible by 3 because there would be a remainder of 1 and a number that is divisible by another should have no remainder

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If it's even and divisible by 3, it's divisible by 6.

If it's divisible by 3 and 4, it's divisible by 12.

A number is divisible by 4 if the last two digits form a number that is divisible by 4, for example 612 is divisible by 4 (because 12 is divisible by 4).

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