2 3 5 7 11 13 17 19 23 29
Of that list, 2, 3 and 5 are prime.
Here are the prime numbers between 10 and 30: 11, 13, 17, 19, 23, 29 Prime numbers are those numbers which cannot be divided to give an integer result except when divided by themselves or by 1.
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.
23 and 29
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.
All prime numbers are divisible by 1. There are an infinite amount of them, so it is impossible to list them.
85
2, 3, 5, 7, 11, 13, 17, 19, 23, 29 (Note 1 is not considered prime.)
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.
Every number from 1-30... 1,2,3,4,5,6,7,8,9,10,11,12,1,3,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,and 30.
30 and 63 are relatively prime numbers. The factors of 30 are 1, 2, 3, 5, and 30, and the factors of 63 are 1, 7, 9, and 63. Two or more numbers are relatively prime if 1 is their only common factor.
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.)