Which of the below owl is odd one out?

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

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

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

There is a number which when you multiply by 3 and subtract 2 from the result, then the resulting number is the reverse of the actual number.

What is the smallest number that stands true on the statement?

What do you think with the below Picture ?

Why are televisions attracted to people?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?