I am white when I am dirty, and black when I am clean. What am I?

I have an eye but still cannot see.

Who am I?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

John was driving a bus and got stuck when passing through an underpass. Then came Jacob with a needle and got the bus out of the underpass.

What did the boy do?

Rob is taller than Edwin, and Jurgen is shorter than Rob.
Of only one of the following statements, we now certainly know it is correct:

A.Edwin is taller than Jurgen
B.Jurgen is taller than Edwin
C.It cannot be determined if Jurgen or Edwin is the tallest.

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

How many triangles can you count in the figure given?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

I can turn polar bears white.
I can make anyone dance.
I can make everyone cry
I can make your hands clap
I can make you thin.
I can make you smile.
I can make you smile

Can you guess the riddle?