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.

Identify Me

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

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

Two old friends, Jack and Bill, meet after a long time.

Three kids
Jack: Hey, how are you, man?
Bill: Not bad, got married and I have three kids now.
Jack: That's awesome. How old are they?
Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.
Jack: Cool..But I still don't know.
Bill: My eldest kid just started taking piano lessons.
Jack: Oh, now I get it.

How old are Bill's kids?

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

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

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

There was a blind man. He had four socks in his drawer either black or white. He opened it and took out two socks. Now the probability that it was a pair of white socks is 1/2.

Can you find out the probability that he had taken out a pair of black socks ?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)