How many positive integers less than 1000 are multiples of 11 whose square roots are whole numbers

$$ {\sqrt{784}} × \sqrt{6.25} + 56\%\ of\ 450=?+186$$

The number of digits in the square root of 625686734489 is 

The weight of a bucket full of water is 36 kg. If the weight of a half-filled bucket is 21 kg, what will be the weight of the empty bucket?

1008 divided by which single-digit number gives a perfect square?

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

916 ×?×3=214344

What is the square root of 0.09 ?

The price of one eraser is Rs. 3. The value of 20 eraser is equal to the value of three Pens. The value of one pen is equal to the value of two pencils and the value of six pencils is equal to the value of five markers. What is the value of one marker?