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

Can you count the number of triangles inside a triangle?

Why Aeroplane windows are round?

Why did Navjot Singh Sidhu put the new January calendar in the freezer

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

Find the 8 in the below-given Image.

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

I went to the bookshop and spent one-half of the money that was in my purse.

When I came out, I found that I had as many cents as I had dollars and half as many dollars as I had cents when I went in. Find the money in my purse when I entered the store.