If six girls can plant 90 trees in a day, how many trees can ten girls plant in a day?
If five men can dig a hole in one hour, how long will it take two men to dig half a hole?
Topics: Starter  Arithmetic  Problem Solving  Ratio
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If a hen and a half, lays an egg and a half, in a day and a half. How many eggs will 9 hens lay in 6 days? 
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That's not how this works. That's not how any of this works. pic.twitter.com/EdSSJInqEp
— Doug Mataconis (@dmataconis) October 9, 2017