2, 3, 5, and 7; also, if it is 1 to 11 inclusive, the list should include 11 because it is a prime number.
2 3 5 7 11 13
231 is NOT a prime number. It is divisible by 3, 7 and 11.
33 is not a prime number because 3 x 11 = 33.
9 is not a prime number as it is divisible by 3
11 is a prime number but 21 is not a prime number as it is divisible by 3.
2, 3, 5, and 7; also, if it is 1 to 11 inclusive, the list should include 11 because it is a prime number.
2 3 5 7 11 13
It is: 2*3*5*7*11 = 2310 inclusive or 3*5*7 = 105
231 is NOT a prime number. It is divisible by 3, 7 and 11.
33 is not a prime number because 3 x 11 = 33.
13 is prime so it is not the number. 15 is the product of 3 and 5, two prime numbers, so it fits the conditions. 17 is prime so it is not the number. 19 is prime so it is not the number. 15 is the only odd number between 11 and 21 that fits the conditions. However, if 21 is included in the range, it also is the product of two prime numbers: 3 x 7.
The prime numbers in the range 1-14 are 2, 3, 5, 7, 11 and 13.
9 is not a prime number as it is divisible by 3
1, 2, 3, 5, 7, 11 Edited answer: 2+3+5+7 = 17 2+3+5+7+11 = 28 (inclusive of 11) Note that 1 is not a prime number.
759 is not prime. 759 = 3 * 11 * 23
For a number to have [only] 2 factors, it must be a prime number; the prime numbers between 0 and 20 are; 2, 3, 5, 7, 11, 13, 17, 19