Why do we preferably have round manhole covers and not square ones?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

What kind of storm is always in a rush?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

Can you find a five letter word that is left with only two letters if one is removed?

The answer I give is yes, but what I mean is no. What was the question?

What is next number in the pattern below:

131 517 192 123 ?