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Method of Finding HCF

Find HCF of ...

Question

Find HCF of $45$ and $72$

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Solution

$45 = 3 \times 3 \times 5 72 = 2 \times 2 \times 2 \times 3 \times 3 H C F = 3 \times 3 = 9$

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Q. Find HCF of 72, 108 and 180 by Listing Common Factors.

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by the fundamental theorem of arithmetic.

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