Question

Find the least 4 digit number which is perfect square

Answer 1

plz see the attachment to know the least 4 digit number which is perfect square.
hope this will help you.

Answer 2

Answer:

1024 is the least four-digit perfect square.

To find:

Least four-digit perfect square

Solution:

We have to find out the four digit least perfect square. Hence, let us start by trial and error method as under:

$(10)^2 = 10 \times 10 = 100$ i.e. Three-digit number

$(20)^2 = 20 \times 20 = 400$ i.e. Three-digit number

$(30)^2 = 30 \times 30 = 900$ i.e. Three-digit number

Now, 900 is three-digit number close to 4 digit numbers i.e. 1000 onwards. Hence,

$(31)^2 = 31 \times 31 = 961$

$(32)^2 = 32 \times 32 = 1024$

Hence, 1024 is the least four-digit perfect square.