21
The sum of the first three prime numbers that end with a 9 (19,29,59) is 107
Prime numbers are those that are not composite. The only prime numbers in this range are 3, 5, and 7.
2, 3, 5, 7, 9 * * * * * 9 is not a prime. The fifth prime is 11.
All numbers greater than one in that range can be co-prime. 4 and 9 are co-prime.
2, 3, 5 are prime numbers but 9 is not a prime number
7 is a prime number but 9 is a composite number
9 is not a prime. 73 is a prime.
The multiples of 9 are numbers that can be divided evenly by 9. The two prime numbers closest to a multiple of 9 are 7 and 11. Since 9 is between 7 and 11, the multiple of 9 that is in between these two prime numbers is 9 itself.
There are square numbers of prime numbers.... The first few prime numbers - and their squares are... * 2 - 4 * 3 - 9 * 5 - 25 * 7 - 49 * 11 - 121 * 13 - 169
Prime numbers from 1 to 9 are: 2 3 5 and 7
the first prime no are 2,3,5,7,11 therefore the mean=2+3+5+9+11/5=5.6
The prime numbers from 1 to 9 are 2, 3, 5 and 7.