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| 400: | 2 | 2 | 2 | 2 | 5 | 5 | |
| 1000: | 2 | 2 | 2 | 5 | 5 | 5 | |
| GCF: | 2 | 2 | 2 | 5 | 5 |
The Greates Common Factor (GCF) is: 2 x 2 x 2 x 5 x 5 = 200
| Greatest Common Factor (GCF) of 69 and 279 | | Greatest Common Factor (GCF) of 83 and 54 | | Greatest Common Factor (GCF) of 200 and 1200 | | Greatest Common Factor (GCF) of 78 and 205 | | Greatest Common Factor (GCF) of 90 and 520 | | Greatest Common Factor (GCF) of 90 and 390 | | Greatest Common Factor (GCF) of 67 and 152 | | Greatest Common Factor (GCF) of 1000 and 2500 | | Greatest Common Factor (GCF) of 1300 and 1500 | | Greatest Common Factor (GCF) of 590 and 1920 | | Greatest Common Factor (GCF) of 1100 and 3300 | | Greatest Common Factor (GCF) of 2 and 44 | | Greatest Common Factor (GCF) of 20 and 240 | | Greatest Common Factor (GCF) of 900 and 3000 | | Greatest Common Factor (GCF) of 160 and 1370 | | Greatest Common Factor (GCF) of 800 and 3300 | | Greatest Common Factor (GCF) of 800 and 1900 | | Greatest Common Factor (GCF) of 720 and 756 | | Greatest Common Factor (GCF) of 150 and 2030 | | Greatest Common Factor (GCF) of 100 and 1500 | | Greatest Common Factor (GCF) of 600 and 930 | | Greatest Common Factor (GCF) of 1000 and 1800 | | Greatest Common Factor (GCF) of 9 and 140 | | Greatest Common Factor (GCF) of 93 and 389 | | Greatest Common Factor (GCF) of 930 and 3890 | | Greatest Common Factor (GCF) of 51 and 96 | | Greatest Common Factor (GCF) of 69 and 202 | | Greatest Common Factor (GCF) of 500 and 1800 | | Greatest Common Factor (GCF) of 58 and 335 | | Greatest Common Factor (GCF) of 500 and 1400 | | Greatest Common Factor (GCF) of 36 and 729 | | Greatest Common Factor (GCF) of 169 and 25 |