What's the only room from which no one can enter or leave

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

What does does this rebus picture means ?

What seven-letter word has hundreds of letters in it?

An octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?

81 x 9 = 801. What must you do to make the this equation true?

In a picnic session, a footballer was practicing. During his play, he busted lips and ears and broke ribs and thighs. However, he was still able to play a professional match on the very next day.



How can this be possible?

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

Which tank will fill first?