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

I always drive my customer away.

Who am I?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

A Shopkeeper collects 71 rupees in the form of 20 paisa and 25 paisa.
He collects a total of 324 coins.

Can you tell me how many number of 20-paisa and 25-paisa he got?

What is the below Rebus indicate?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

What number when divided in half becomes zero?

What demands an answer, but asks no questions

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

What can jump higher than a building?