The greatest 4 digit number which is a perfect square, is = ?

19999
29909
39801
49081

Answer:- 1

Explanation:-

Solution:

\begin{aligned} Greatest 4 digit number \\ =  9999 \\ 9| 9999 | 99 \\ | 81 \\ \bar{189 | 1899} \\ | 1701 \\ \bar{| 198} \end{aligned}

$\eqalign{ & {\text{Greatest 4 digit number}} \cr & {\text{ = 9999 }} \cr & \,\,\,\,\,\,\,\,{\text{9| }}\,{\text{9999 | 99}} \cr & \,\,\,\,\,\,\,\,\,\,\,|\,\,\,81 \cr & \overline {189\,\,|\,\,\,1899} \cr & \,\,\,\,\,\,\,\,\,\,\,|\,\,\,1701 \cr & \,\,\,\,\,\,\,\,\,\,\,\overline {|\,\,\,\,\,198} \cr}$
Greatest four digit number is a perfect square
= 999 - 198
= 9801

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Greatest four digit number is a perfect square
= 999 - 198
= 9801 ", "dateCreated": "7/24/2019 10:09:12 AM", "author": { "@type": "Person", "name": "Nitin Sir" } }, "suggestedAnswer": { "@type": "Answer", "text": "

Solution: