The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

What kind of band never plays music?

There are three boxes on a table. One of the box contains Gold and the other two are empty. A printed message contains in each box. One of the message is true and the other two are lies.

The first box says "The Gold is not here".

The Second box says "The Gold is not here".

The Third box says "The Gold is in the Second box".

Which box has the Gold?

Complete the table series riddle by finding the number that can replace "??".

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

A sundial has the fewest moving parts of any timepiece. Which has the most?

how come the second man dies?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

The following question it puts forth you:

25 - 55 + (85 + 65) = ?

Then, you are told that even though you might think it's wrong, the correct answer is actually 5!

Whats your reaction to it? How can this be true?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?