GCF of 63 and 84 | How to Find GCF of 63, 84?GCF of 84 and 42 | How to Find GCF of 84, 42?GCF - Greatest Common FactorGCF of 84 and 90 | How to Find GCF of 84, 90?Part A: Find the LCM of 7 and 12. Show your work. Part B: Find the GCFGCF of 28 and 49 | How to Find GCF of 28, 49?GCF of 84 and 105 | How to Find GCF of 84, 105?GCF of 72 and 84 | How to Find GCF of 72, 84?PPT - Greatest Common Factor (GCF) PowerPoint Presentation, freeGCF of 42 and 48 | How to Find GCF of 42, 48?PPT - Factors and Greatest Common Factors (GCF) PowerPoint Presentation