Answer:
Prime factorization of the numbers.
1. 18
Prime Factorization of 18: 2 × 3 × 3 or 2 × 32.
2. 55
Prime Factorization of 15: 5 × 11
3. 75
Prime factorization of 75: 3 × 5 × 5
4. 84
Prime factorization of 84: 2 × 2 × 3 × 7
5. 93
Prime factorization of 93: 3 × 31
6. 102
Prime factorization of 102: 2 × 3 × 17