Find the least number that must be subtracted from the following number to make it a perfect square. $21,789$

Consider the following numbers:

$$\begin{gathered} 1. 2222 \\ 2. 11664 \\ 3. 343343 \\ 4. 220347 \end{gathered}$$

Which of the above are not perfect squares?

Arrange the following in the descending order $\left(\sqrt{23}-\sqrt{21}), (\sqrt{19}-\sqrt{17}), (\sqrt{21}-\sqrt{19}\right)$.

Find the square root of $6889$ by using Dwandwa Yoga Method.

The value of $\sqrt{96+\sqrt{2304}}$ is

Find the square root of  the following number by using the method of prime factorization: $441$

Find the square root of the following number correct to two decimal places.

$3\frac{1}{4}$

Solve:

$\sqrt{\frac{169}{225}}$

Find the square root of the following number by using the method of prime factorization: $225$

By what least number should $4056$ be divided to get a perfect square number? Also, find the number whose square is the new number.