Question

Find the least four-digits number that is a perfect square.

• A. 1024
• B. 1765
• C. 1300
• D. 1200

Answer 1

The correct option is A

1024

Since, the least four digit number is 1000
Now, find the square root of 1000 by long division method.
$\begin{array}{cc}& 32\\ 3& \overline{10}\overline{00}\\ & -9\\ 62& 100\\ & -124\\ & -24\end{array}$
Hence, the least four digit number which is a perfect square = 1000 + 24 = 1024.