You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

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?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

How far can you walk into the woods?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?