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.

How could a baby fall out of a twenty-story building onto the ground and live?

What is black when you buy it, red when you use it, and gray when you throw it away?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

Can you identify the Oscar-winning movie from the rebus below?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

In a contest, four fruits (an apple, a banana, an orange, and a pear) have been placed in four closed boxes (one fruit per box). People may guess which fruit is in which box. 123 people participate in the contest. When the boxes are opened, it turns out that 43 people have guessed none of the fruits correctly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctly.
How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly

A bomb exploded in a room full of married couples and no one died. How?