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*From*: TLA Plus <tlapl...@xxxxxxxxx>*Date*: Wed, 4 Feb 2015 13:48:52 -0800*References*: <74871342-8fab-40ff-a050-8ba336333980@googlegroups.com>

Thanks for the puzzle. It took me just a little more time to write a spec that allows TLC to solve the problem than to solve it myself. (However, I had heard it before and so recreating the solution was easy.) TLC found the solution in a few seconds. I will leave this as a puzzle for readers to solve, and I hope others will do the same. I therefore rejected an email someone just sent that reveals the solution, although not the TLA+ spec that allows TLC to solve it. After TLC shows you the answer, the reasoning behind it becomes fairly obvious.

On Wed, Feb 4, 2015 at 1:15 PM, stepha...@xxxxxxxxx <guys...@xxxxxxxxx> wrote:

A farmer has a 40 pound stone and a balance scale. How can he break the stone into 4 pieces so that, using those pieces and the balance scale, he can weigh out any integral number of pounds of corn from 1 pound through 40 pounds.

Who to use TLA+ to specify the problem and use TLC to find the solution?

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**Follow-Ups**:**Re: [tlaplus] Mathematical puzzle modeling***From:*TLA Plus

**References**:**Mathematical puzzle modeling***From:*stepha...@xxxxxxxxx

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