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 Two fours (or fewer?) (Posted on 2006-04-07)
There is a way to express 64 with only two fours and no symbols beyond +, -, *, /, ^, √, !, and parenthesis, although some may be used more than once. It isn't too hard. Can you find it?

It is asserted in a reliable source that 64 can also be expressed with a single 4 using 57 square root signs, nine factorials (no double or higher factorials), and 18 sets of parentheses. I can't figure it out. Can you?

 See The Solution Submitted by Jer Rating: 4.0000 (2 votes)

 Subject Author Date I have a solution to he first part Tim 2006-04-17 01:47:45 re: Second Part, Solution Dej Mar 2006-04-11 16:22:20 Unreliable use of reliable source Jer 2006-04-11 12:44:22 re: Second Part Jer 2006-04-11 12:26:36 re(2): Reliable source Dej Mar 2006-04-10 17:59:02 re: Reliable source Jer 2006-04-10 15:59:32 Reliable source Jer 2006-04-10 15:50:32 Looking at the possiblities Gamer 2006-04-10 15:16:21 Second Part:: I "Figured" it out Dej Mar 2006-04-10 00:41:35 You're either !N or you're out Larry 2006-04-08 16:06:15 Second Part Demau Senae 2006-04-08 15:07:40 re: Solution to first part Tristan 2006-04-07 22:59:59 re: better method (spoiler, first part) Dej Mar 2006-04-07 20:36:51 better method The riddler 2006-04-07 19:28:16 Solution to first part Dej Mar 2006-04-07 15:27:38

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