11 is a Prime number but 21 is not a prime number as it is divisible by 3.
11 and 107 are the prime numbers.
The prime numbers between 10 and 21 are 11, 13, 17, and 19.
No, 21 and 23 are not twin prime numbers. Twin primes are pairs of prime numbers that differ by 2, such as 3 and 5, or 11 and 13.
Four. The prime numbers between 10 and 21 are 11, 13, 17, and 19.
The prime numbers from 1 to 21 are 2, 3, 5, 7, 11, 13, 17, and 19.
The even numbers 52 and 94 can be eliminated right away because the only even prime number is 2. That leaves 11, 21, 57, and 107. 3 x 7 = 21, so it is not prime. 3 x 19 = 57, so it is not prime. 11 and 107 are the prime numbers.
11 is the only prime number. 21, 52, 57 and 94 are divisible by 3, 2, 3 and 2 respectively, and are therefore not prime numbers.
The prime numbers between 2 and 21 are: 2, 3, 5, 7, 11, 13, 17 and 19
3, 7 and 11.
Out of the above set of numbers, the numbers 11,47,91 are Prime.
11 and 31 and all the fives between numbers.
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.