Question

find the hcf of the 30 and 45
using prime factors.

​

Answer 1

Answer:

Find the prime factorization of 30. 30 = 2 × 3 × 5.

Find the prime factorization of 45. 45 = 3 × 3 × 5.

To find the GCF, multiply all the prime factors common to both numbers: Therefore, GCF = 3 × 5.

GCF = 15.