21 22 23 24 which is the prime number
23 is prime.
23
21 = 3x7 ... not prime. 22 = 2x11 ... not prime. 23 is prime. 23.
The prime number is 24
Only 23 is a prime number.
23 is a prime number.
19 and 23 are prime.
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
You can work this out, Prime numbers can only be divided by themselves or 1. Therefore as 20 can be divided by 2 it it not prime. The same is true for 22 and 24. Thus the prime must be either 21 or 23. See if either of these numbers can be divided by 7, if it can then the prime must be the other number.
The prime number about 22 is 23. 23 is a prime number because it has no factors except for 23 and itself.
All the numbers are composite except the ones in bold: 18 19 20 21 22 23 24 25.