I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

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

A father's child, a mother's child, yet no one's son.

Who am I?

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.