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Zero to 100 with 12345 (Posted on 2005-10-29) Difficulty: 4 of 5
Find an expression for each integer zero to 100 which satisfies the following conditions:

- Each of the numbers 1, 2, 3, 4, and 5 appears exactly once in each expression and no other numbers. There is no concatenation or decimal points.
- Each of the four elementary operations (+ - * /) appears exactly once in each expression.
- The only other items which may be in an expression are factorial (!) and parentheses. Factorials and parentheses may occur as many times as needed or not be used at all.

Example: 0=5+3-4*2/1 or 0=(3!+4)/5-2*1

See The Solution Submitted by Brian Smith    
Rating: 2.0000 (2 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re(4): computer solution -- minimum use of factorial Comment 7 of 7 |
(In reply to re(3): computer solution -- minimum use of factorial by Charlie)

lol, wow, stumped on such an easy one.  My rough work in fact is still sitting here on my desk in front of me, and it reads 3+4, but I clearly remember this resulting in 12 in my head.  Ichecked a few times over to ensure that each number and each symbol had been used once, but never bothered to check my actual arithmetic apparently... Sigh.

Sorry Charlie!

  Posted by Cory Taylor on 2005-11-02 10:32:22

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