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 Topic: 4 fours
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 Expressing the natural numbers in terms of 4 fours. 2010-01-19 From Steve:When I was studying mathematics, there were several of us that tried to express the natural numbers in terms of 4 fours. Allowing the use of any known math operation, for example n to the zeroth power is 1.Is there more info on this exercise. This was done mentally, nothing written down.Answered by Robert Dawson. Four fours 2007-08-23 From Belinda:My son came home with a math question that I can figure out. He needs to use only the number 4 and only four 4's, no less no more. The problems need the answers 11,13,14,and 18. He can use any mathematical sign except square root. He's been able to get all but these so far and I've worked them, but can't come up with the problems. Can anyone help?Answered by Stephen la Rocque.

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