The Value of $$ {\sqrt{6-\sqrt{17-2\sqrt{72}}}}$$ is closest to:

The least number, by which 1944 must be multiplied so as to make the result a perfect cube is 

$$ { \sqrt{(0.798)^2+0.404×0.798+(0.202)^2}+1=?} $$

Find the value of given equations

$$\left({216\over1} \right) ^{-{2\over3}}÷\left({27\over1} \right) ^{-{4\over3}}=? $$

The largest number of five digits, which is a perfect square is 

Direction: what should come in place at question mark(?).

$$ {\sqrt{4489}+(71)^{2}-(?)^{2}=2707}$$

Simplify : $$ {(2x)^{2}-(2y)^{2}-(4x)^{2}}$$

Evaluate: $${-(4-6)^2-3(-2)+।-6।\over 18-9÷3×5}$$