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I am not aware of a solution using the four basic operations of arithmetic, but otherwise:

129 = [(4^4)/sqrt(4)] + sqrt(sqrt(sqrt(sqrt...(sqrt(4))...)))

* * * * * * * * * * * *

No matter how many times you square root it, it will not equal 1

To the OP. I have spend a lot of time on this one. Just wanting to make sure that the correct number is 129 and you are sure you are using only 4 fours. It would work out great if using 5 fours. If you made a mistake, correct it and I'll check back. In the mean time, I'll continue thinking about a solution for 4 fours and 129.

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Wiki User

12y ago

What else can I help you with?