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 List of Puzzles List of Solutions Solution to Christmas Puzzle 2.CHRISTMAS FANTASY LAND Let R, B, G and Y be the values of the Red, Blue, Green and Yellow gifts respectively.   To solve the problem, we use the following algebraic equations:      R + 2B = 2G     G+Y=R+B     2Y+R=G     G=xY where x is an integer representing the number of yellow gifts. Solving for x, it can be shown that a Green gift is worth 4 Yellow gifts, a Blue gift is worth 3 Yellow gifts, and a Red gift is worth is worth 2 Yellow gift. Support this site

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 Second Scientific American Book of Mathematical Puzzles and Diversions Author:  Martin Gardner

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