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

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

What is more useful when it is broken?

Count the number of lines in the image below ?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

How many times can you subtract the number two from the number fifty?

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?