John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

A kind heart person buy packed food at 3$/packet from United states and sells them at 1$/packet at Africa. After some time he becomes a millionaire.

How come the guy become millionaire ?

In a supermarket, there is an intelligent glass pane before a refrigerating unit. This glass pane allows cherries and apples through it but does not allow grapes and Orange to pass through it.

Can you identify the rule that the glass pane is following?

Can you find out which triangle will have a bigger area among the following?
1. A triangle with sides 300, 400 and 500
2. A triangle with sides 300, 400 and 700

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

How can you make number one disappear by adding something to it?

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

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