John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

What makes this number unique: 8,549,176,320?

Count the number of squares in the picture below.

Can you count the number of triangles in the picture below?

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

What is next number in the pattern below:

131 517 192 123 ?

What is the riddle which can be asked all day with a different correct answer each time.