John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

What does a man do only once in his lifetime, but women do once a year after they are 29?

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

Can you find the key in the picture below?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

Can you find out which options fits best with the missing column?

What is the fastest way to double your money?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Replace the question mark with the correct number below.