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

A man dies of old age on his 25 birthday. How is this possible?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

Which is the rope you never skip with?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

Five lovely ladies(Sophia, Isabella, Madison, Emma and Olivia) planned a picnic.

They each buy one thing each for the picnic.

Sophia, Emma and Olivia got a drink : orange-Juice, apple-juice, and mango-juice.
Olivia got the drink with the same letter as the one in her first name.
Emma loves mango-juice.
The other two bring some food : chocolates and pizza.
Also Madison is allergic to cheese.

So which ladies bought what ?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?