Q18 of 56 Page 17

Find the H.C.F and L.C.M of 30, 72, 432 by using prime factorization method.

H.C.F of 30, 72 and 432 by using prime factorization method is

Prime factors of 30 = 2 × 3 × 5


Prime factors of 72 = 2 × 2 × 2 × 3 × 3


Prime factors of 432 = 2 × 2 × 2 × 2 × 3 × 3 × 3


The H.C.F of 30, 72 and 432 is the product of all common prime factors using the least power of each common prime factor.


Common Prime Factor = 2 × 3 = 6


L.C.M of 30, 72 and 432 is the product of all common prime factors using the highest power of each common prime factor.


2 × 2 × 2 × 2 × 3 × 3 × 3 × 5 = 2160


H.C.F is 6


And L.C.M is 2160


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