Question

Four-digit smallest perfect square is.____

• A. 1025
• B. 1024
• C. 1021
• D. 1000

Answer 1

The correct option is B 1024

Smallest four digit number = 1000

To find: Four-digit smallest perfect square
Now, Checking whether $1000$ is perfect square or not.


From above table, $1000$ is not a perfect square, $24$ must be added to it to make a perfect square.
$\therefore 1024$ is the smallest four-digit perfect square.