I’m tall when I’m young, and I’m short when I’m old. What am I?

I add 5 to 9 and get 2. The answer is correct, so what am I?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

You stand in front of two doors. A guard stands next to each door. You know the following things: one path leads to paradise, the other leads to death. You cannot distinguish between the two doors. You also know that one of the two guards always tells the truth and the other always lies. You have permission to ask one guard one question to discover which door leads to paradise. What one question would you ask to guarantee you enter the door to paradise?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.

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 ?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

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

I am the fastest animal but cannot climb the tree. What am I?

Can you find out the remainder when 3^300 is divided by 5?