What is both possible and impossible at the same time?

Count the squares in the matchstick puzzle below?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Which number should replace the question mark?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

Can you make a fire with just a single stick?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

There was a strange boy who was born before his father. How can this be possible?

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?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?