What number do you get when you multiply all of the numbers on a telephone's number pad?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?

What has many teeth, but cannot bite?

Can you name an animal whose killing cannot be performed without spilling your own blood?

A man is lying dead in a field where no one is around. His head is split open and his legs are disfigured. Near to him, there is an unopened package. No living organism can be found anywhere at the crime scene.

How did he die?

10+10 and 11+11 can give you the same answer.

Explain how?

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

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.