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Q.

Which of the following numbers is not perfect square?


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a

100

b

1000

c

10000

d

1000000 

answer is B.

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Detailed Solution

The given numbers are 100, 1000, 10000, 1000000.
It is required to find which of the given numbers are not perfect squares.
We are aware that a square number's final zeros must be even.
By analyzing the options,
In option 2, the number of zeros in 1000 is odd and in remaining options, the terminating zeros count is even.
So, 1000 is not a perfect square.
Therefore, option 2 is correct.
 
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