Calculate the Greatest Common Factor or GCF of 10, 80, 100 and 125
Sponsors
The instructions to find the GCF of 10, 80, 100 and 125 are the next:
1. Decompose all numbers into prime factors
| 10 | 2 |
| 5 | 5 |
| 1 |
| 80 | 2 |
| 40 | 2 |
| 20 | 2 |
| 10 | 2 |
| 5 | 5 |
| 1 |
| 100 | 2 |
| 50 | 2 |
| 25 | 5 |
| 5 | 5 |
| 1 |
| 125 | 5 |
| 25 | 5 |
| 5 | 5 |
| 1 |
2. Write all numbers as the product of its prime factors
| Prime factors of 10 | = | 2 . 5 |
| Prime factors of 80 | = | 24 . 5 |
| Prime factors of 100 | = | 22 . 52 |
| Prime factors of 125 | = | 53 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 5
Common prime factors with the lowest exponent: 51
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 = 51 = 5
Also calculates the: