There was an aeroplane crash, every single person died, but two people survived. How is this possible?

What is next number in the pattern below:

131 517 192 123 ?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?

One day, I thought of ways that can be used for creating a palindrome. So I decided that I will turn into a larger number by adding the reversed digits to the original number and keep doing it till I finally obtained a palindrome.

I am not sure if this process will always result in a palindrome eventually but I was able to produce a four-digit palindrome. Can you guess my starting number?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

I have teeth but i don't bite. Who Am I ?