64 = 65 ??? Erturk Kocalar Junior Member Posts: 22 Threads: 6 Joined: Feb 2011 02-19-2012, 03:08 PM My dad forward this to me. It proves 64 = 65. Not really. It took me 10 seconds to figure out what's wrong. http://img7.exs.cx/img7/6534/1388.gif I did click on the link; I'm using mac os; my computer is still fine. (If you are using windows, please click at your own risk.) enjoy. Edited: 19 Feb 2012, 3:09 p.m. C.Ret Senior Member Posts: 260 Threads: 0 Joined: Oct 2008 02-19-2012, 03:15 PM Ah! Ah! That's a well know property, moving any colored shape makes algebra wrong ! Another illustration : Edited: 19 Feb 2012, 3:17 p.m. Erturk Kocalar Junior Member Posts: 22 Threads: 6 Joined: Feb 2011 02-19-2012, 03:31 PM Very cool. I haven't seen these before. Dieter Senior Member Posts: 653 Threads: 26 Joined: Aug 2010 02-19-2012, 03:39 PM All this - especially the well known property of moving colored shapes making algebra wrong ;-) - works because our eyes simply do not work sufficiently accurate to distinguish two very similar, yet different slopes in the red/green and blue/orange shapes (first example) resp. the red and green triangles in the second example. If you look more closely you'll notice that the slopes of the mentioned shapes are slightly different, so they cannot be arranged the way the final layout suggests. One the one hand it's 3:8 boxes, on the other hand it's 2:5. In other words: 0,375 vs. 0,4. Which is so close that the difference it is not obvious for the human eye. Dieter Gerson W. Barbosa Posting Freak Posts: 2,761 Threads: 100 Joined: Jul 2005 02-19-2012, 07:48 PM This picture might disprove the equality: Another interesting illusion: Paul Dale Posting Freak Posts: 3,229 Threads: 42 Joined: Jul 2006 02-19-2012, 07:54 PM Quote:Another interesting illusion: Lovely. I'd not seen this one before. - Pauli Ed Look Posting Freak Posts: 801 Threads: 36 Joined: Nov 2005 02-20-2012, 03:44 PM Way cool!! All of these are fascinating! « Next Oldest | Next Newest »

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