1. **Find the GCF of 24 and 36 using Listing Factors Method** - List factors of 24: 1, 2, 3, 4, 6, 8, 12, 24 - List factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, 36 - Common factors: 1, 2, 3, 4, 6, 12 - Greatest common factor: **12** 2. **Find the GCF of 40 and 60 using Listing Factors Method** - List factors of 40: 1, 2, 4, 5, 8, 10, 20, 40 - List factors of 60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60 - Common factors: 1, 2, 4, 5, 10, 20 - Greatest common factor: **20** 3. **Find the GCF of 42 and 56 using Listing Factors Method** - List factors of 42: 1, 2, 3, 6, 7, 14, 21, 42 - List factors of 56: 1, 2, 4, 7, 8, 14, 28, 56 - Common factors: 1, 2, 7, 14 - Greatest common factor: **14** 4. **Find the GCF of 81 and 63 using Listing Factors Method** - List factors of 81: 1, 3, 9, 27, 81 - List factors of 63: 1, 3, 7, 9, 21, 63 - Common factors: 1, 3, 9 - Greatest common factor: **9**