A Chinese man walks past Christmas decorated trees on display in Beijing on December 10, 2012. Mathematics has provided an answer for those striving for the perfect Christmas tree, Britain's University of Sheffield says after being set the challenge of decorating a tree so that greenery and glitz are in harmonious proportion. Their formula states a six-feet Christmas tree would need 37 baubles, around 30 feet of tinsel and 19 feet of lights, and a seven-inch star or angel to achieve the perfect look.
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