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Question

Find the H.C.F. of 105,140,175by Prime factorization method .


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Solution

Finding the H..C.F. by prime factorization -

Highest Common factor ( H.C.F. ) of two natural numbers is the largest common factor ( or divisor ) of the given numbe

Prime Factorization of given numbers are :

105=3×5×7140=2×2×5×7175=5×5×7

Here, 5 occurs as a common prime factor at least once and 7 occurs also at least once in the prime factors of given numbers.

HCF(105,140,175)=5×7=35.

Hence , H.C.F. of 105,140,175 is 35


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