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| 12: | 2 | 2 | 3 | |
| 66: | 2 | 3 | 11 | |
| GCF: | 2 | 3 |
The Greates Common Factor (GCF) is: 2 x 3 = 6
| Greatest Common Factor (GCF) of 17 and 23 | | Greatest Common Factor (GCF) of 126 and 252 | | Greatest Common Factor (GCF) of 175 and 315 | | Greatest Common Factor (GCF) of 250 and 45 | | Greatest Common Factor (GCF) of 175 and 70 | | Greatest Common Factor (GCF) of 225 and 240 | | Greatest Common Factor (GCF) of 125 and 80 | | Greatest Common Factor (GCF) of 35 and 22 | | Greatest Common Factor (GCF) of 35 and 125 | | Greatest Common Factor (GCF) of 36 and 39 | | Greatest Common Factor (GCF) of 64 and 8 | | Greatest Common Factor (GCF) of 22 and 9 | | Greatest Common Factor (GCF) of 51 and 17 | | Greatest Common Factor (GCF) of 122 and 98 | | Greatest Common Factor (GCF) of 40 and 45 | | Greatest Common Factor (GCF) of 30 and 5 | | Greatest Common Factor (GCF) of 16 and 83 | | Greatest Common Factor (GCF) of 34 and 136 | | Greatest Common Factor (GCF) of 25 and 46 | | Greatest Common Factor (GCF) of 1000 and 4 | | Greatest Common Factor (GCF) of 28 and 46 | | Greatest Common Factor (GCF) of 84 and 21 | | Greatest Common Factor (GCF) of 65 and 70 | | Greatest Common Factor (GCF) of 90 and 45 | | Greatest Common Factor (GCF) of 5 and 10000 | | Greatest Common Factor (GCF) of 100 and 40 | | Greatest Common Factor (GCF) of 42 and 11 | | Greatest Common Factor (GCF) of 10 and 80 | | Greatest Common Factor (GCF) of 2 and 40 | | Greatest Common Factor (GCF) of 8 and 4200 | | Greatest Common Factor (GCF) of 8 and 33600 | | Greatest Common Factor (GCF) of 70 and 15 |