Find the smallest number that must be added to $400$ to make it a perfect cube.

108

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112

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18

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12

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Solution

The correct option is B $112$
Smallest no to be added to $400$ to make it a perfect cube is
As $8^{3} = 512 7^{3} = 343$
$∴ 512 - 400 = 112$ should be added.

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