23 is a prime number.
17, 19, 23, 29 and 31 are prime. 15, 21, 25 and 27 are composite..
3, 13, 17, 23 are prime numbers. The others are not.
No, 23 is not a twin prime. A twin prime is a prime number that has a prime number difference of 2 with the nearest prime number. In the case of 23, the nearest prime numbers are 19 and 29, which do not have a difference of 2.
The composite numbers between 20 and 25 are 21, 22, and 24. 23 is the only prime number between 20 and 25.
23 is a prime number.
It is 23
21 22 23 24 which is the prime number
23
21 = 3 x 7, so it is not a prime number. 23 = 1 x 23, it does not have any other factors, so it is a prime number. 25 = 5 x 5, so it is not a prime number.
17, 19, 23, 29 and 31 are prime. 15, 21, 25 and 27 are composite..
3, 13, 17, 23 are prime numbers. The others are not.
They are all prime numbers except for 15 21 25 and 27 which are composite numbers
The number 21 would be the answer. 19 and 23 only have two factors, 1 and themselves, as they are prime numbers. 25 only has 1, 25 and 5. 21 has 1, 21, 3 and 7 for 4 possible factors.
prime of numbers 21 22 23 24 25 26 27 28 29 30 prime numbers are: 23 & 29 because their factors are only 1 and themselves. factors of: 23= 1, 23 29= 1, 29 22, 24, 25, 26, 27, 28 & 30 are not prime numbers because these numbers have other factors aside from 1 and themselves. Example: factors of 22: 1, 2, 11, 22
All the numbers are composite except the ones in bold: 18 19 20 21 22 23 24 25.
23 is prime.