Brain Teasers
How Many Chickens
In Farmer Donald's hay loft there are a number of ants, mice and chickens. There are ten times as many ants as mice and there are four times as many mice as chickens. Altogether there are 1806 feet. How many chickens are there?
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Doesn't farmer Donald have anything better to do than counting ants and mice? Like perhaps getting a cat?
but you only asked for "How many CHICKENS are there?" so why does the ants & whatever matter???? 
Weak teaser. Anybody who set this up as an algebra problem wasted their time:
1806 / (2 + 4*4 + 4*10*6) = 1806/258 = 7
1806 / (2 + 4*4 + 4*10*6) = 1806/258 = 7
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