A man dies of old age on his 25 birthday. How is this possible?

Replace the question mark with the number below given a simple math problem.

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

In the following picture, E is going to slide the object down and as per the terrain and the physics, the round object is going to travel all the way till the end. Now, can you analyze who all people will die when it happens?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

There are forty elephants and they have forty-fore heads. How can this be possible?

How old is your son? asked a man to his neighbour. My son is five times as old as my daughter and my wife is five times as old as my son. I am twice as old as my wife whereas my grandmother, who is celebrating her eighty-first birthday is as old as all of us put together.

How old is the man's son ?

Why do you find that most of the buildings are deprived of the 13th floor?