Calculate the Greatest Common Factor or GCF of 155, 220 and 308
Sponsors
The instructions to find the GCF of 155, 220 and 308 are the next:
1. Decompose all numbers into prime factors
| 155 | 5 |
| 31 | 31 |
| 1 |
| 220 | 2 |
| 110 | 2 |
| 55 | 5 |
| 11 | 11 |
| 1 |
| 308 | 2 |
| 154 | 2 |
| 77 | 7 |
| 11 | 11 |
| 1 |
2. Write all numbers as the product of its prime factors
| Prime factors of 155 | = | 5 . 31 |
| Prime factors of 220 | = | 22 . 5 . 11 |
| Prime factors of 308 | = | 22 . 7 . 11 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: None
Common prime factors with the lowest exponent: None
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.
Since there are not common prime factors the GCF is 1
Also calculates the: