A bookworm’s meal Stumbled on this one when I was doing research for my new site, haven’t seen this around before, so I thought I’d throw it out here: http://www.flooble.com/perplexus/show.php?pid=12 levik Wednesday, April 17, 2002 An hour, I think? Adrian Adrian Gilby Thursday, April 18, 2002 10mm + 10mm + 1mm + 1mm = 22mm Pages + Pagse + BackCover + Frontcover 22 * .5 = 11 hours Dave Schnizlein Thursday, April 18, 2002 Adrian is right. Dave is wrong. Look *carefully* at the illustration. Gareth McCaughan Thursday, April 18, 2002 I suppose it depends on your cultural perspective... If the books were in Chinese (for instance) then Dave's answer would be correct! Adrian Adrian Gilby Friday, April 19, 2002 Oh, come on... Don't make me go and add to the problem that the books are in english, I think it's a pretty safe assumption to make they are your regular left to right variety... :) levik Friday, April 19, 2002 Well, okay... but I do wonder about the proportion of left-to-right vs right-to-left books in the world. Adrian Adrian Gilby Friday, April 19, 2002 The aha factor on this one is pretty high ;-) Michael H. Pryor Friday, April 19, 2002 Yes, yes it is. Thankfully, I chose not to disclose the AHA factor up front on my site, only difficulty :) levik Friday, April 19, 2002 who says the books aren't upside down? Dave Schnizlein Saturday, April 20, 2002 The picture does :) the digits "1" and "2" are clearly right side up. Any more nitpicks? levik Saturday, April 20, 2002 >>>"Stumbled on this one when I was doing research for my new site, haven’t seen this around before,"<<< The part of this statement that I find interesting is the "haven’t seen this around before" part. The first time I saw this puzzle was about 40 years ago and I wouldn't be surprised if it was already 40 years old then.  It is quite a simple problem, but must have just the right aha factor to keep it popular all this time. mackinac Tuesday, April 30, 2002 Actually, what I meant to say was that I haven't seen this problem around *here* before.  :) I readily believe this problem is very old, since all the good ones seem to be :) levik Wednesday, May 8, 2002   Fog Creek Home