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All prime numbers are divisible only by one and themselves.

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Q: How many prime no is divisible only by it self and 1 but not by any other number?
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Related questions

How many prime numbers are divisible by 11?

Just the one: 11 itself. If any other number were divisible by 11 that number would not be a prime.


How many prime numbers are divisible by 210?

None, if a number is divisible by 210 then it is not a prime number!


How many prime numbers divisible by three?

No prime numbers are divisible by 3. By definition a prime number isn't divisible by anything but itself and 1.


How many primes less than 1000 are divisible by 7?

Just 7. Any other number divisible by 7 isn't prime.


Is 84 prime?

No, it is divisible by 2,4 and many other numbers.


How many prime numbers are there between 20 and 200 end with an 8?

None. A number that ends with 8 is even, that is, divisible by 2. ================================ To be prime a number must only be divisible by itself and 1 thus any number divisible by 2 can not be a prime number. Therefore the answer to your question is:- "There are no prime numbers between 20 and 200 that end with an 8".


How many prime numbers are divisible by 12?

None. 12 is a composite and any number divisible by a composite is itself a composite.


The number 210 is divisible by how many prime numbers?

By four prime numbers which are: 2 3 5 and 7


Are there more prime numbers that are odd or even?

There are infinitely many prime numbers. There is only one even prime number, which is 2, because all other even numbers are divisible by 2 and thus are not prime. So, there are infinitely many odd prime numbers and only one even prime number.


Is there more prime numbers then composite?

There are many, many more composite numbers than prime numbers. For example, beyond the number 3, every other number is composite, as it is divisible by 2. Following this, every number ending with a 5 other than 5 itself is composite, as it is divisible by 5, and every third odd number is divisble by 3. There are many complicated divisibility tests for numbers above 5.


Is 4500 prime?

4500 is not a prime number. In fact it has many numbers other than itself and 1 that divide into it. such as 450, 10, 50, 100, 25, 5, 2, etc-----------------------------------------------------------No even number can ever be a prime as it is divisible by 2.


Is every odd number is prime or not?

No, there are many odd numbers that are not prime: 9, 15, 21, 25, 27, etc. However, 2 is the only even number that is prime, since all other even numbers are divisible by 2.

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