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

A blonde put eyeliner on her head. Why?

A sundial has the fewest moving parts of any timepiece. Which has the most?

John's five friends Rachel, Jacob, Phoebe, Joey and Chandler live on the same road.

Rachel lives in the house: A, Jacob lives in the house: B, Phoebe lives in the house: C, Joey lives in the house:D, Chandler lives in the house: E

Mathematically
B*C*D = 1260
B + C + D = 2E
2A = E

The road numbers run from 2 to 222.

Can you tell me the house number of each of John's friends?

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

Usually, a boxing match consists of twelve rounds. In a particular friendly match between two heavyweights, the match was finished in the ninth round itself as one of the boxers knocked out the other one.

But, in that fight, no man threw even a single punch.

How can this be possible?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

I can sizzle like bacon,
I am made with an egg,
I have plenty of backbone, but lack a good leg,
I peel layers like onions, but still remain whole,
I can be long, like a flagpole, yet fit in a hole.

Which number comes next in the number series?

2, 9, 30, 93, ?

Which digit occurred maximum times between the number 1 and 1000?