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| 66: | 2 | 3 | 11 | |
| 138: | 2 | 3 | 23 | |
| GCF: | 2 | 3 |
The Greates Common Factor (GCF) is: 2 x 3 = 6
| Greatest Common Factor (GCF) of 420 and 294 | | Greatest Common Factor (GCF) of 610 and 180 | | Greatest Common Factor (GCF) of 231 and 24 | | Greatest Common Factor (GCF) of 20 and 520 | | Greatest Common Factor (GCF) of 150 and 370 | | Greatest Common Factor (GCF) of 132 and 306 | | Greatest Common Factor (GCF) of 342 and 506 | | Greatest Common Factor (GCF) of 12 and 506 | | Greatest Common Factor (GCF) of 35 and 506 | | Greatest Common Factor (GCF) of 14 and 253 | | Greatest Common Factor (GCF) of 468 and 24 | | Greatest Common Factor (GCF) of 92 and 287 | | Greatest Common Factor (GCF) of 276 and 861 | | Greatest Common Factor (GCF) of 56 and 360 | | Greatest Common Factor (GCF) of 1089 and 495 | | Greatest Common Factor (GCF) of 112 and 406 | | Greatest Common Factor (GCF) of 588 and 300 | | Greatest Common Factor (GCF) of 420 and 588 | | Greatest Common Factor (GCF) of 675 and 360 | | Greatest Common Factor (GCF) of 800 and 9 | | Greatest Common Factor (GCF) of 256 and 5 | | Greatest Common Factor (GCF) of 1024 and 20 | | Greatest Common Factor (GCF) of 810 and 3125 | | Greatest Common Factor (GCF) of 162 and 3125 | | Greatest Common Factor (GCF) of 343 and 280 | | Greatest Common Factor (GCF) of 18 and 133 | | Greatest Common Factor (GCF) of 133 and 36 | | Greatest Common Factor (GCF) of 267 and 180 | | Greatest Common Factor (GCF) of 256 and 15625 | | Greatest Common Factor (GCF) of 180 and 116 | | Greatest Common Factor (GCF) of 270 and 1024 | | Greatest Common Factor (GCF) of 121 and 360 |