Calculate the Greatest Common Factor or GCF of 6840
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The instructions to find the GCF of 6840 are the next:
1. Decompose all numbers into prime factors
6840 | 2 |
3420 | 2 |
1710 | 2 |
855 | 3 |
285 | 3 |
95 | 5 |
19 | 19 |
1 |
2. Write all numbers as the product of its prime factors
Prime factors of 6840 | = | 23 . 32 . 5 . 19 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 2 , 3 , 5 , 19
Common prime factors with the lowest exponent: 23, 32, 51, 191
4. Calculate the Greatest Common Factor or GCF
Remember, to find the GCF of several numbers you must multiply the common prime factors with the lowest exponent.
GCF = 23. 32. 51. 191 = 6840
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