Calculate the Greatest Common Factor or GCF of 90, 120 and 150
Sponsors
The instructions to find the GCF of 90, 120 and 150 are the next:
1. Decompose all numbers into prime factors
| 90 | 2 |
| 45 | 3 |
| 15 | 3 |
| 5 | 5 |
| 1 |
| 120 | 2 |
| 60 | 2 |
| 30 | 2 |
| 15 | 3 |
| 5 | 5 |
| 1 |
| 150 | 2 |
| 75 | 3 |
| 25 | 5 |
| 5 | 5 |
| 1 |
2. Write all numbers as the product of its prime factors
| Prime factors of 90 | = | 2 . 32 . 5 |
| Prime factors of 120 | = | 23 . 3 . 5 |
| Prime factors of 150 | = | 2 . 3 . 52 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 2 , 3 , 5
Common prime factors with the lowest exponent: 21, 31, 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 = 21. 31. 51 = 30
Also calculates the: