Calculate the Greatest Common Factor or GCF of 10, 164 and 286
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The instructions to find the GCF of 10, 164 and 286 are the next:
1. Decompose all numbers into prime factors
| 10 | 2 |
| 5 | 5 |
| 1 |
| 164 | 2 |
| 82 | 2 |
| 41 | 41 |
| 1 |
| 286 | 2 |
| 143 | 11 |
| 13 | 13 |
| 1 |
2. Write all numbers as the product of its prime factors
| Prime factors of 10 | = | 2 . 5 |
| Prime factors of 164 | = | 22 . 41 |
| Prime factors of 286 | = | 2 . 11 . 13 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 2
Common prime factors with the lowest exponent: 21
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 = 21 = 2
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