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| 18: | 2 | 3 | 3 | |
| 63: | 3 | 3 | 7 | |
| GCF: | 3 | 3 |
The Greates Common Factor (GCF) is: 3 x 3 = 9
| Greatest Common Factor (GCF) of 20 and 5 | | Greatest Common Factor (GCF) of 3 and 40 | | Greatest Common Factor (GCF) of 60 and 30 | | Greatest Common Factor (GCF) of 3 and 8 | | Greatest Common Factor (GCF) of 120 and 20 | | Greatest Common Factor (GCF) of 5 and 3 | | Greatest Common Factor (GCF) of 8 and 60 | | Greatest Common Factor (GCF) of 2 and 3 | | Greatest Common Factor (GCF) of 12 and 20 | | Greatest Common Factor (GCF) of 15 and 24 | | Greatest Common Factor (GCF) of 3 and 6 | | Greatest Common Factor (GCF) of 8 and 13 | | Greatest Common Factor (GCF) of 22 and 19 | | Greatest Common Factor (GCF) of 13 and 26 | | Greatest Common Factor (GCF) of 15 and 48 | | Greatest Common Factor (GCF) of 26 and 34 | | Greatest Common Factor (GCF) of 16 and 35 | | Greatest Common Factor (GCF) of 8 and 32 | | Greatest Common Factor (GCF) of 10 and 20 | | Greatest Common Factor (GCF) of 8 and 3 | | Greatest Common Factor (GCF) of 7 and 18 | | Greatest Common Factor (GCF) of 22 and 88 | | Greatest Common Factor (GCF) of 39 and 78 | | Greatest Common Factor (GCF) of 26 and 78 | | Greatest Common Factor (GCF) of 26 and 39 | | Greatest Common Factor (GCF) of 60 and 48 | | Greatest Common Factor (GCF) of 5 and 11 | | Greatest Common Factor (GCF) of 102 and 153 | | Greatest Common Factor (GCF) of 24 and 46 | | Greatest Common Factor (GCF) of 36 and 45 | | Greatest Common Factor (GCF) of 3 and 21 | | Greatest Common Factor (GCF) of 5 and 84 |