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 2 + 2 = 5 (Posted on 2008-09-16)
Using only two 2s and any of the standard mathematical symbols, write an expression whose value is equal to 5.

An approach could be: sqrt((2 * 2)!) = 4.90

Standard mathematical symbols (for this problem) are: addition, subtraction, multiplication, division, exponentiation, square root, factorization, parenthesis, positive, negative, ln, log. Superfactorials and such are not excluded, but not part of the desired solution. Any symbol having a value of its own, such as e, pi, and infinity, is not authorized.

 See The Solution Submitted by Leming Rating: 4.0000 (1 votes)

 Subject Author Date Does these count? Dej Mar 2008-09-17 00:56:15 This one seems too simple to be correct cyclothymic 2008-09-16 15:32:32 no ceiling... pcbouhid 2008-09-16 14:06:01 some solution(s) Dej Mar 2008-09-16 11:16:02 A simple modification -- trivial solution Charlie 2008-09-16 10:48:11

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