Calcudoku puzzle forumhttps://www.calcudoku.org/forum/ truncated(?) labels for exponentshttps://www.calcudoku.org/forum/viewtopic.php?f=2&t=49 Page 1 of 1

 Author: jaek  [ Fri Jul 29, 2011 8:56 pm ] Post subject: truncated(?) labels for exponents Today's difficult 8 was a little more difficult that usual for me. The three cell, L-shaped cage that starts in the seventh row is labeled "6^". That looks like 6^1^1 to me, so I entered 1,6,1 early on, but soon ran into a contradiction.It turns out that 1,6,1 is incorrect and that the label should be "216^". Oddly, both 1,6,1 and the correct triplet passed the puzzle's audits.A similar thing happened two or three weeks ago as well. Is anyone else experiencing this? Is anyone seeing the correct "216^" label?

 Author: pnm  [ Fri Jul 29, 2011 9:45 pm ] Post subject: Re: truncated(?) labels for exponents jaek wrote:It turns out that 1,6,1 is incorrect and that the label should be "216^". Oddly, both 1,6,1 and the correct triplet passed the puzzle's audits.It's because the exponentiation evaluation is done from right to left.for 6, 1, 1: 6 ^ (1 ^ 1) = 6 ^ 1 = 6for 6, 3, 1 (the solution in this case): 6 ^ (1 ^ 3) = 6 ^ 1 = 6Patrick

 Author: jaek  [ Fri Jul 29, 2011 9:52 pm ] Post subject: Re: truncated(?) labels for exponents pnm wrote:jaek wrote:It turns out that 1,6,1 is incorrect and that the label should be "216^". Oddly, both 1,6,1 and the correct triplet passed the puzzle's audits.It's because the exponentiation evaluation is done from right to left.for 6, 1, 1: 6 ^ (1 ^ 1) = 6 ^ 1 = 6for 6, 3, 1 (the solution in this case): 6 ^ (1 ^ 3) = 6 ^ 1 = 6PatrickOf course. I was so sure of my incorrect explanation that I couldn't see the fairly obvious correct one. Thanks.

 Author: pnm  [ Fri Jul 29, 2011 10:39 pm ] Post subject: Re: truncated(?) labels for exponents jaek wrote:Of course. I was so sure of my incorrect explanation that I couldn't see the fairly obvious correct one. Thanks.I did switch a couple of months ago (was it April?) from left-to-right evaluationfor exponentiation to the more common right-to-left though. So you're notcompletely crazy

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