The number of digits in the square root of 625686734489 is 

The simplified value of
$${{1\over 3}÷{1\over 3}×{1\over 3}\over{1\over 3}÷{1\over 3}of{1\over 3}}-{1\over 9}$$

Simplify the following equation.
$${(785.785.785+435.435.435) \over(785)^{2}+(435)^{2}-(785)(435)}$$

Direction : What should come in place of the question (?) in the following question.

140% of 450 + 24% of 650 =?

The number, whose square is equal to the difference between the squares of 975 and 585, is: 

(5.5)³-(4.5)³ is equal to : 

Evaluate: ।।