If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

What do you think with the below Picture ?

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I?

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
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What has one eye, but can’t see?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

You bought me for dinner but never eat me. What am I?

What work can one never finish?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?