Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

You stand in front of two doors. A guard stands next to each door. You know the following things: one path leads to paradise, the other leads to death. You cannot distinguish between the two doors. You also know that one of the two guards always tells the truth and the other always lies. You have permission to ask one guard one question to discover which door leads to paradise. What one question would you ask to guarantee you enter the door to paradise?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

A new clothing store has a unique method of pricing items. A vest costs $20, a tie costs $15, a blouse costs $30, and underwear costs $45. How much would pants cost?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

Can you name four days which start with the letter 'T'?

You have 1023 apples and 10 bags. You have to distribute these apples in these 10 bags in any way you choose. But when I ask for a certain number of apples you have to give them in terms of bags without transferring the apples from other bags. How do you distribute the apples?

The following sentence is false. The preceding sentence is true.
Are these two sentences true or false?

I am white when I am dirty, and black when I am clean. What am I?