Abhishek Chauhan and Vivek Singhal Solutions for Chapter: Squares and Square Roots, Exercise 4: Topic Exercise 6.4

What is the least number to be added to $8200$ to make it a perfect square (using division method)?
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Find the difference in $777$ and its nearest perfect square number.

Evaluate $\sqrt{0.90}$ up to three places of decimal.

Find the value of $\sqrt{400}+\sqrt{0.04}+\sqrt{0.000004}$.

Find the value of $\sqrt{\frac{{\displaystyle 0.0289}}{{\displaystyle 0.0121}}}+\sqrt{\frac{64}{16}}$.

Evaluate $\sqrt{10}+\frac{\sqrt{9.5\times 0.0085\times 18.9}}{0.021\times .0017\times 1.9}$

Evaluate $\sqrt{0.80}$ correct up to two places of decimal.

If $\sqrt{x}+43=\sqrt{19881}$ then find the value of $x$.