Trivia Question..(Math Related)?

Okay so here is the question. I need help finding the answer.

*You have 3 coins and a pan balance scale. The coins are alike in appearance, but you know that one of them is counterfeit and lighter than the other two. Explain in detail how you would find the counterfeit coin in just ONE weighing.*

For whatever crazy reason, I have money stored thoughout the house.1 coffee can full of pennies, 1 half full of nickles, dimes and quarters, 1 just recently started with Canadian money only and finally the laundry coffee can. The laundry coffee can is there because those of my household forget to empty their pockets. I have told them, whatever money is found belongs to the laundry room. Well, up to five dollars. Anything above that, they get an ear full then their money. All this collected stashed money is our mad money for those wacky weekends to spend recklessly. LOL
How about you seniors? Do you maintain coffee cans for such money?

Canadian Coin Collectors?

the Royal Canadian Mint is making way too many coins. Most of them don’t even have pictures to do with Canada on them like 1 has a picture a of Santa Clause on it, another is shaped like a playing Card, there are about 40 different olympics quarters, Hockey team symbols, about 50 different olympic dollar coins, a 20dollar coin with a picture of sharks on it, most of them are not even being circulated and have to be purchased off the Mint. My point is they are making way too many and making it imposable for a Collect to get them all, especially since they are not all being circulated. any thoughts on the subject?

take a look:

http://images.google.ca/imgres?imgurl=http://www.coinnews.net/wp-content/images/2009/2008-Canadian-Coins.jpg&imgrefurl=http://www.coinnews.net/2009/07/page/5/&usg=___zq9-ICOd9jm8Zto2dsZr9EEIrQ=&h=226&w=387&sz=18&hl=en&start=90&sig2=L1I6HxLa6M8ZP1ZMs3m5gA&um=1&itbs=1&tbnid=CmMfT4XKC3SakM:&tbnh=72&tbnw=123&prev=/images%3Fq%3Drare%2BCanadian%2Bcoins%26start%3D84%26um%3D1%26hl%3Den%26lr%3D%26safe%3Doff%26sa%3DN%26rlz%3D1W1ACAW_enCA336CA336%26ndsp%3D21%26tbs%3Disch:1&ei=fK6MS4PGDpXClAfLo7GuDQ

http://images.google.ca/imgres?imgurl=http://www.coincollectingnews.org/wp-content/uploads/2009/09/Top-3-Moments-Featured-25-cent-Olympic-coins1.jpg&imgrefurl=http://www.coincollectingnews.org/2010-canadian-25-cent-coin-designs-selected-by-vote/105662&usg=__TrPL33_Cmw0_v4ULBKifYqf4Na4=&h=370&w=510&sz=63&hl=en&start=105&sig2=foXQgr8IrG2vWFKXlRB–g&um=1&itbs=1&tbnid=T3a5Qi26W6GBLM:&tbnh=95&tbnw=131&prev=/images%3Fq%3Drare%2BCanadian%2Bcoins%26start%3D84%26um%3D1%26hl%3Den%26lr%3D%26safe%3Doff%26sa%3DN%26rlz%3D1W1ACAW_enCA336CA336%26ndsp%3D21%26tbs%3Disch:1&ei=fK6MS4PGDpXClAfLo7GuDQ

http://www.coinnews.net/wp-content/images/pr/RCM/Royal-Canadian-Mint-Latest-2008-Coin-Products.jpg

(excuse any spelling or grammar mistakes)

How can you change the currencies?

I have a collection of Canadian coins and I don’t know how much it is worth in our country.

what started the recession?

Hi i’m very curious to know, what started the recession that were currently facing? what will happen to the american and canadian currency? and will it get any worse?

thanks!

I have another math ?

you have 12 identical-looking coins, one of which is counterfeit. The counterfeit coin is either heavier or lighter than the rest. the only scale available is a simple balance. using the scale only 3 times. find the counterfeit coin

And yes- I am stating the riddle right according to an email I received. I do know that it is not a Canadian quarter being used wither.