Question 151176
A GCD of 1 means two numbers are relatively prime.
1)Find the prime factors for 24 (2*2*2*3)
2)Find all prime numbers < 24. Any of them other than 2 and 3 are in for sure. 2,3,5,7,11,13,17,19,23. So we know 5,7,11,13,17,19,23 are good
3)Now are there other numbers less than 24 that are the product of prime numbers we found in step 2? 5*5 is > 25, so there are no others.

answer: 1, 5,7,11,13,17,19,23