You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example
If the balls you picked had the numbers 6 and 13, you lose $1.
If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

How can one talk without saying a single word?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

What is the next number in the series?

15 29 56 108 208 ?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

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

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

The day after tomorrow will be three days before Tuesday. Can you find out what is today?