# Puzzle

if 1 Elk - 1 Polar bears = 1 penguin
& 1 Elk + 3 penguins = 3 polar bears
then
1 Polar bear + 1 elk = ?

Thanks for any help
14:49 Thu 17th May 2012

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 5 penguins 14:50 Thu 17th May 2012 Question Author great thanks but how did you reach that answer please 14:52 Thu 17th May 2012 I got 5 penguins as well elk=4 polar bear=2 penguin=1 14:56 Thu 17th May 2012 simple algebra - let E = elk, B = bear, P = penguin 1st equation: E - B = P rearranged: E - P = -B 2nd equation: E + 3P = 3B subtract rearranged 1st from the 2nd to get: 4P = 2B i.e. B = 2P substitute that in 1st equation to get: E = 3P thus 3rd equation gives: B + E = 2P + 3P = 5P 14:56 Thu 17th May 2012 OOPS elk=3 14:56 Thu 17th May 2012 Question Author Thanks again 15:03 Thu 17th May 2012

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