Prime numbers from 1 to 12: 2, 3, 5, 7, 11
Composite numbers from 1 to 12: 4, 6, 8, 9. 10. 12
Look up a list of prime numbers (a Google search for "prime numbers" or "list of prime numbers" should do); every number (greater than 1) that is NOT a prime number is composite.
The prime numbers from 1 to 12 are 2, 3, 5, 7, and 11.
The prime numbers between 1 and 12 are: 2 3 5 7 11
All prime numbers are divisible by 1. There are an infinite amount of them, so it is impossible to list them.
85
The list is far too long to list here (millions of them); a search on "list of prime numbers" can quickly give you the desired prime numbers.
Look up a list of prime numbers (a Google search for "prime numbers" or "list of prime numbers" should do); every number (greater than 1) that is NOT a prime number is composite.
The prime numbers from 1 to 12 are 2, 3, 5, 7, and 11.
The prime numbers between 1 and 12 are: 2 3 5 7 11
All prime numbers are divisible by 1. There are an infinite amount of them, so it is impossible to list them.
85
It is impossible to list all the prime numbers as there are an infinite number of them. The list of prime numbers starts: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, ... Suppose you could list all the prime numbers and have done so - there is no prime number which is not on the list. Multiply them all together and add 1. This number is not divisible by any of the listed prime numbers as there is always a remainder of 1. So either this new number is a prime number, or there is another prime number not listed which will divide into it. Which means that the list was not all the prime numbers; meaning it is impossible to list all the prime numbers.
No, neither 12 nor 18 are prime numbers. A prime number is a number greater than 1 that can only be divided by 1 and itself. Both 12 and 18 can be divided by numbers other than 1 and themselves, so they are not prime.
Please note that there are infinitely many prime numbers. An Internet search for "list of prime numbers" will quickly give you a list of prime numbers up to a certain point, for example here: http://en.wikipedia.org/wiki/List_of_prime_numbers Any integer greater than 1 that is not in the list of prime numbers is a composite number. (1 is considered neither a prime number, nor a composite number.)
The natural numbers from 1 to 12 are: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 The prime numbers between 1 and 12 are: 2, 3, 5, 7, 11 This is a total of 5/12 prime numbers.
The sum of the prime numbers from 1 to 12 is equal to 2 + 3 + 5 + 7 + 11 = 28.
The two prime numbers that add up to 19 are 7 and 12. Prime numbers are numbers greater than 1 that can only be divided by 1 and themselves. In this case, 7 and 12 are not prime numbers, and there are no two prime numbers that add up to 19.