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

What is the longest word in the dictionary?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

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.

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

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?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

How could a baby fall out of a twenty-story building onto the ground and live?

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

Manish and Manoj play 5 games of chess.
Both Manish and Manoj win the exact same number of games. There is no tie at all.

How?