What is next number in the pattern below:

131 517 192 123 ?

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.

What has one letter and starts with an E?

A monk has a very specific ritual for climbing up the steps to the temple. First, he climbs up to the middle step and meditates for 1 minute. Then he climbs up 8 steps and faces east until he hears a bird singing. Then he walks down 12 steps and picks up a pebble. He takes one step up and tosses the pebble over his left shoulder. Now, he walks up the remaining steps three at a time which only takes him 9 paces. How many steps are there?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

What number should come in place of the question mark below?

What will you call your mother's brother's brother-in-law?

10+10 and 11+11 can give you the same answer.

Explain how?

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

I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?