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Two fours (or fewer?) (Posted on 2006-04-07) Difficulty: 3 of 5
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)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Some ThoughtsI have a solution to he first partTim2006-04-17 01:47:45
Solutionre: Second Part, SolutionDej Mar2006-04-11 16:22:20
Unreliable use of reliable sourceJer2006-04-11 12:44:22
re: Second PartJer2006-04-11 12:26:36
Some Thoughtsre(2): Reliable sourceDej Mar2006-04-10 17:59:02
re: Reliable sourceJer2006-04-10 15:59:32
Reliable sourceJer2006-04-10 15:50:32
Looking at the possiblitiesGamer2006-04-10 15:16:21
Some ThoughtsSecond Part:: I "Figured" it outDej Mar2006-04-10 00:41:35
You're either !N or you're outLarry2006-04-08 16:06:15
Second PartDemau Senae2006-04-08 15:07:40
re: Solution to first partTristan2006-04-07 22:59:59
Questionre: better method (spoiler, first part)Dej Mar2006-04-07 20:36:51
better methodThe riddler2006-04-07 19:28:16
SolutionSolution to first partDej Mar2006-04-07 15:27:38
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