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

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

What time is it when an elephant sits on a fence?

What goes up but never comes down?

Find the number of squares in the below-given picture.