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

Which tank will fill first?

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

There was a blind man. He had four socks in his drawer either black or white. He opened it and took out two socks. Now the probability that it was a pair of white socks is 1/2.

Can you find out the probability that he had taken out a pair of black socks ?

Consider all the numbers between 1 and 1 million. Among all these numbers, there is something very special about the number 8 and the number 2202. What is it?

Why Aeroplane windows are round?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

I taste better than I can smell. Who am I?

It's pretty hard to give up.
If you remove a part of it, you will be left with a bit.
Even if you remove another part, the bit still remains.
Remove one more and it still remains.

What is it?

Can you find out which number multiplied by itself will give the output as 12345678987654321?