Question 525550: I have two coins, both U.S. currency and together they add up to $0.30. One of the coins is not a quarter. What are the two coins?
Answer by lmeeks54(111)   (Show Source):
You can put this solution on YOUR website! This is a trick question and found often in joke and riddle books (my 4th grade daughter loves trying to trip me up on problems like this).
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First, with US coins coming in 1, 5, 10, 25, 50, and 100 cents denominations, and two problem conditions:
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US currency (so no trick of using foreign coins of different values)
Only two coins allowed
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The answer HAS to be: a nickel and a quarter.
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The stipulation that ONE (my emphasis) is not a quarter often throws people off; however, it only means of the two coins in question, one of them cannot be a quarter. The intuitive trick is to go, "a ha!, the other coin is the quarter, the first must be the nickel."
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This trick is based on words and logic, not on mathematics...
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cheers,
Lee
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