Show that 189 is not a perfect cube. Find the smallest number by which it must be divided to
make it a perfect cube.
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189= 3 x 3 x 3 x 7. Making triplets , we find that one triplet is formed and we are left with one more factor. Thus, 189 can not be expressed as a product of Triplets.
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I have read 5/13 of a book. what fraction of the book is left
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