It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

If eleven plus two equals one, what does nine plus five equal?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

A non-stop marathon is the shared favourite sport of three brothers.

*The oldest one is fat and short and trudges slowly on.
*The middle brother's tall and slim and keeps a steady pace.
*The youngest runs just like the wind, speeding through the race.

"He is young in years, we let him run!" the other two brothers explained, "'because though he is surely number one, he is second, in a way." Why is it?

The Little ant seems to be always confused. Do you know why?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

How can you make number one disappear by adding something to it?

What has many keys but can’t open a single lock?