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

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

The Little ant seems to be always confused. Do you know why?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

Look at the picture and find out which square is not linked with any of the other squares.

The below mentioned letters have been placed in a order using a logic.

DEAD, BALL, FEAR, SHOP

Can you find the logic?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

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?