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No, positive integers ending with the digit 5 are divisible by 5.

That's pretty easy to figure out. Any number that has a 5 or 0 in the ones place is divisible by 5. Which means it has to be composite.

composite

Q: Is 605 a prime number or a composite number?

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It is prime

86 is not a prime number, so is a composite.

No 168 is not a prime number it is a composite number

Prime.

It is a composite number.

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605 is composite. (All whole numbers ending in 5 are composite numbers, except the number 5 itself.).

Composite divisible by at least 5

Yes.

No, because you can divide 605 by 5.

It is not a prime number, it is a composite number.

It is not a prime number, it is a composite number.

It is prime

86 is not a prime number, so is a composite.

It is a Prime number, and therefore not a composite number.211 is a prime number.

It is a prime number, and therefore not a composite number.211 is a prime number.

No 168 is not a prime number it is a composite number

The number is not COMPOSITE. Instead, it is a prime number.