Given Numbers: 36, 54, 90
Identify the Prime Factors of 36, 54 and 90 by Prime Factorization
Identify the Prime Factors of 36, 54 and 90 by Prime Factorization
- Prime Factorization of 36: 36 = 2 x 2 x 3 x 3 = 22 x 32
- Prime Factorization of 54: 54 = 2 x 3 x 3 x 3 = 21 x 33
- Prime Factorization of 90: 90 = 2 x 3 x 3 x 5 = 21 x 32 x 51
Determine the Prime Factor(s) that are common to the Prime Factorization of each number:
- 2 and 3 are Prime Factors common to the Prime Factorizations of 36, 54 and 90
Determine the least number of occurrences of 2 and 3 among the Prime Factorizations:
- 2 occurs at least 1 time in each Prime Factorization
- 3 occurs at least 2 times in each Prime Factorization
As a result, the Greatest Common Factor (GCF) of 36, 54 and 90 is equal to 2 x 3 x 3, which equals the product of 2 and 3 raised to the powers of their least number of occurrences or smallest exponent among the Prime Factorizations:
- GCF(36, 54, 90) = 21 x 32 = 2 x 3 x 3
- GCF(36, 54, 90) = 2 x 9
- GCF(36, 54, 90) = 18
Therefore, the Greatest Common Factor of 36, 54 and 90 by Prime Factorization = 18