Santa Claus found that two elves could pack two stockings in two minutes. How many temporary elves did Santa Claus have to hire to get those stockings packed at the rate of eighteen stockings every six minutes? (from the book by A. Salny)
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Wednesday, March 18, 2009
Santa's helpers
Posted by
Maria
at
11:23 PM
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4 comments:
3elves (1per min)= 3stock/min
3stockx6 min +18 stock
Close but wrong.
2elves have packing rate of 2/2min
want to pack at rate of:
18/6min
reduce stockings packed/2min:
6/2min
numelfpairs(2 stocks/2min)= 6 stocks/2min
numelfpairs=3
6 elves
Great! New puzzle is coming tomorrow.
And it will not require any of the math symbols to be explained or solved :)
Check in the morning.
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