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Answered 2014-08-19 09:49:15

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

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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 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 no is divisible only by it self and 1 but not by any other number?

All prime numbers are divisible only by one and themselves.


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".


Why are not all odd numbers greater than 3 are prime numbers?

Because many of them are divisible by smaller odd numbers. For example 35 is divisible by 5 and so 35 cannot be a prime number.


How many prime numbers are divisible by 12?

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


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.


What number is greater than 1 and divisible only by itself and 1?

These numbers are called prime. There are many,many prime numbers, some of which are 13,23, and 7


How many prime numbers between 0 100 are divisible by 7?

prime numbers between 0 -100 which are divisible by 7: 7


How Many Prime Numbers are Odd?

Infinite. All prime numbers are odd with the exception of 2. Prime numbers are only divisible by 1 and themselves. That's the rule. The only prime number that is even is 2 since all other even numbers are divisible by 2 also. Hence all prime numbers are odd with the exception of 2.


What are all the prime numbers with 1 in the units place?

All of them??? There are probably infinitely many. Here are the first few numbers with 1 in the units place: 1: Not usually considered a prime number. 11: Prime 21: Not prime (divisible by 3) 31: Prime 41: Prime 51: Divisible by 3 61: Prime 71: Prime 81: Divisible by 3 91: Divisible by 7 101: Prime ...


How many prime numbers are divisible by 2?

Since a prime number has only two positive integer factors, itself and 1, the only prime number with 2 as a factor is the number 2 itself.


Is 84 prime?

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


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.


What is the connection between Euclid and prime numbers?

Euclid (c. 300 BC) was one of the first to prove that there are infinitely many prime numbers. His proof was essentially to assume that there were a finite number of prime numbers, and arrive at a contradiction. Thus, there must be infinitely many prime numbers. Specifically, he supposed that if there were a finite number of prime numbers, then if one were to multiply all those prime numbers together and add 1, it would result in a number that was not divisible by any of the (finite number of) prime numbers, thus would itself be a prime number larger than the largest prime number in the assumed list - a contradiction.


What group of numbers even or odd contain more prime numbers?

All even numbers except 2 are divisible and thus not prime. There is no such number for odd numbers, and there is in fact just one even prime and infinitely many odd primes.


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.


What numbers are prime numbers?

Prime numbers are numbers that are only divisible by 1 and the number itself. Some examples of prime numbers are:1,2,3,5,7,11,13,17,19,23,27,29,31,37,41,etc.Prime numbers can go on forever; you just have to find out if its only factors are 1 and itself.Example:9 is not a prime number because other than 1 and 9, it is also divisable by 3.13 is a prime number because its only factors to equal 13 are 1 and 13.Even numbers, with the exception of 0 and 2, cannot be prime numbers.I'm a different person:1 isn't a prime number although many people think it is. this is because a prime number is divisible by itself and 1 but in this case it is the same number so this time 1 isn't a prime number. The definition is that a prime number is a natural number (integers 1 and greater) that has exactly two unique factors: 1 and itself. The number 1 does not have two unique factors.


Is the number 1 a prime or composite number?

1 is not a prime number many people consider it to be one but to be a prime number it must only be divisible by 1 and itself. 1 is only divisible by one and nothing else. the number 1 is also not a composite. Composite numbers are divisible by 1, itself and another number which one is not. Instead it falls under a category called a unit


What is 7 divisible by?

7 is only divisible by itself and one because it is a prime number.


Is 640 prime?

No, it is divisible by many numbers including 2 and 320.


How many positive prime numbers have a ones digit of 5?

Only one positive prime number has a 5 in the ones digit. That prime number is 5. All other numbers with a 5 in the ones digit are composite because they will be divisible by 5.


Which number is not divisible by 5?

There are infinitely many numbers that are not divisible by 5. 3 is one such number..



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