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Find the number of ways of expressing 18...

Find the number of ways of expressing 180 as a product of two factors.

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`180 = 2^2xx3^2xx5^1`
Number of factors = (2+1)(2+1)(1+1) = 18
Hence, there are total `18/2 = 9` ways in which 180 can be expressed as a product of two factors.
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