How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

What seven-letter word has hundreds of letters in it?

What number when divided in half becomes zero?

You need to move three matchsticks to form three squares. Can you do it?

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

The more it dries, the wetter it becomes. Can you tell what it is?

Count the number of triangles in the picture below:

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?