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

I look at you, you look at me I raise my right, you raise your left. What am I?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

The chance of Mr John winning the lottery is 10%. All participants lined up and Mr John is 4th in the row. The first three participants lose the lottery.

What is the chance of Mr John now?

What is the riddle which can be asked all day with a different correct answer each time.

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

What am I?

What month of the year has 28 days?