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

How Come ??

What can jump higher than a building?

John, a 5-year-old boy, was really fond of the chocolates. He asked his Mother to give him some money to buy his favourite chocolates. His Mother gave him $45. He went to the shopkeeper and asked, "How much is one chocolate for?". The shopkeeper said $3 for one chocolate. Also, if you give me the wrappers of three chocolates, I will give you one for the exchange.
In total, how much chocolate could John eat?

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 ?

Can you make a six-letter word using the letters N, A and B ?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

Can you place six X (crosses) in below board without making three in a row in any way ?

You see me once in June, twice in November, and not at all in May. What am I?

A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?

I make two people out of one. What am I?