Q: When is a number divisible by 13?

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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.

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

-10

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

221 is divisible by 1, 13, 17, and 221.

The divisibility rule for 3 is as follows: If the sum of the digits of a number is divisible by 3 then the number is divisible by 3. For example, the number 21 is divisible by 3 since 2+1=3, and 3 is divisible by 3. The number 49 is not divisible by 3 since 4+9=13, and 13 is not divisible by 3.

No 13 is not a composite number. 13 is only divisible by 1 and itself. So it is a prime number.

Any multiple of 8580.

Yes, it is divisible by 13 (it is 13 squared).

No. Consider 13 or 23.

Yes, it is divisible by 1, 13, 79, 1027.

some are but most are not. There are actually an infinite number that are, 13, 26, 39, 52, etc. are all divisible by 13.

143 is not a prime number; it is divisible by 11 and 13.Incidentally, it is divisible by 1; all numbers are.

No. 26 is divisible by 2 and 13.

No. 2197 is divisible by 13.

No, it is divisible by 3 and 13

1170 is.

No. It is divisible by 13 and 71.

260

The smallest number divisible by 5 7 9 11 13 and 15 is 45,045.

78 is evenly divisible by 1, 2, 3, and 13.