1 dollar = 100 cent
= 10 cent x 10 cent
= 1/10 dollar x 1/10 dollar
= 1/100 dollar
= 1 cent

=> 1 dollar = 1 cent

solve this tricky problem?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

How can one talk without saying a single word?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

10 people came into a hotel with 9 rooms and each guest wanted his own room. The bellboy solved this problem.
He asked the tenth guest to wait for a little with the first guest in room number 1. So in the first room, there were two people. The bellboy took the third guest to room number 2, the fourth to number 3, ..., and the ninth guest to room number 8. Then he returned to room number 1 and took the tenth guest to room number 9, still vacant.
How can everybody have his own room?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

What is at the end of a rainbow?

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

Why is it very easy to weigh a fish?

What goes through cities and fields, but never moves?