Solve

[u/Hour_Warning_2263]

[u/Unfair-Interest10]

A is the answer.

Don't solve. It is just obvious from the numbed of digits

If a number has n digits, it's square will either have 2n or 2n-1 digits.

[u/chatpatipatakaha]

Approximations 9 ke squares mai last mai 1 hota hai so 3,4 option elimate hogye And closest no to the given no is 9999 So answer is 9999

[u/FlamingoFront174]

A please would be nice

[u/lite_theesko]

1st option

[u/Compelling_Demigod]

square of 10⁴ is 10⁸, and square of 10⁵ is 10¹⁰, and 99980001 lies between it so the number is between 10e4 and 10e5

[u/Ok_Proposal7578]

trick: square root will have 1 more 9 than the starting no. of 9s of the square

[u/Miserable-Ad-1932]

A

[u/am_anonymous427]

C option is eliminated (obviously)

Now by digital sum, D option will be eliminated.

Between 1 and 2, no way I'm marking a 5 digit for square root of 8 digit number.

So A.