105 is not a Prime number. You can readily see that 3 and 5 go into it, and 7 goes into it too. The number ends in 5, and 5 goes into any number ending in 0 or 5. The sum of the digits is 6, and when the sum of the digits is divisible by 3, then so is the original number.
105 is not a prime number among them. It is because it is divisible by 5.
Assuming you meant 101, 103, 105 & 107... The number 105 is not prime - as it will divide by 5 or 3.
97 101 103
The prime numbers between 80 and 105 are: 83, 89, 97, 101, 103
Eleven numbers less than 105 are relatively prime to 105. They are 82, 83, 86, 88, 89, 92, 94, 97, 101, 103, and 104.
105 is not a prime number among them. It is because it is divisible by 5.
Assuming you meant 101, 103, 105 & 107... The number 105 is not prime - as it will divide by 5 or 3.
101, 103, 107, 109 not 105 as that is divisible by 5
97 101 103
89 97 101 103.
The prime numbers between 80 and 105 are: 83, 89, 97, 101, 103
Eleven numbers less than 105 are relatively prime to 105. They are 82, 83, 86, 88, 89, 92, 94, 97, 101, 103, and 104.
61, 67, 71, 73, 79, 83, 89, 97, 101 and 103.
The numbers 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101 and 103 are prime.
205
103 or 105
For this type of question, you should search the Internet for a list of prime numbers. All the integers that are not prime numbers are composite. In this case, the relevant prime numbers are 101 and 103.