From: Kelly Jones <kelly.terry.jones@...>
Date: 2010-04-01T06:11:41+09:00
Subject: Ruby solve classic math problem: make 56 from four 4s

A classic math problem asks "using only four 4s and any
mathematical operation, come up with the number
56". "4!+4!+4+4" is one of probably several answers [1].

I want to write a ruby program that solves the
generalization: "given X number of the digit Y and a
set of permitted mathematical operations/functions, can
you come up with the number Z?"

Has anyone already done this?

[1] http://mathforum.org/ruth/four4s.puzzle.html

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