Find the samllest number by which each of the following numbers must be multiplied to obtain a perfect cube
1 : 256
2: 72
3: 675
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1) 256 is the correct answer. ☺
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Therefore, 243 must be multiplied by 3 to make it a perfect cube. Here one factor 2 is required to make a 3's group. Therefore, 256 must be multiplied by 2 to make it a perfect cube.
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