Question

find the greatest number of 4 digit that is a perfect square.

please tell anyone​

Answer 1

The smallest  4 digit number is 1000.

The greatest 4 digit number is 9999.

We know that,

The square of 100 is 10000 or 1 more noteworthy than the biggest 4 digit number.

So, the closest square root of the largest perfect square is 99. So. The square of 99 is

(99)²=9801(99)2=9801

We can say that, the largest closest square of four digits is 99.

Hence, The greatest 4 digit number is 9999 and it is the closest square of 99.

Answer 2

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The greatest 4 digit number is 9999

Now

$\sqrt{9999} = 99.99$

So the required number is

$= {99}^{2} = 9801$

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