tag:blogger.com,1999:blog-3802979373213475425.post2384931333437367177..comments2024-03-17T20:25:54.267+05:30Comments on Critical Thinking Puzzles: Bridge crossing problemAnonymoushttp://www.blogger.com/profile/05634752405801576739noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-3802979373213475425.post-77391245416322636862015-10-22T17:53:04.759+05:302015-10-22T17:53:04.759+05:30it takes 10 minutes
D goes first with the flashlig...it takes 10 minutes<br />D goes first with the flashlight and lights the way for the others: A, B and C (1+2+5=8)dorinnoreply@blogger.comtag:blogger.com,1999:blog-3802979373213475425.post-67076422770313334992011-10-28T16:53:57.760+05:302011-10-28T16:53:57.760+05:30A 1 minute,B 2 minutes,C 5 minutes,
D 10 minutes.
...A 1 minute,B 2 minutes,C 5 minutes,<br />D 10 minutes.<br /><br />trip1 - A+B =2<br />'B' return with flash light=2<br /><br />trip2 - C+D =10<br />'A' return with flash light=1<br /><br />trip3 - A+B =2<br /><br />17 minutesAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-3802979373213475425.post-52546327959126132022009-03-27T22:40:00.000+05:302009-03-27T22:40:00.000+05:30Nope - 3+5=8 not 6! That's the 19 minute method. C...Nope - 3+5=8 not 6! That's the 19 minute method. C and D <B>must</B> cross together.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3802979373213475425.post-25006365998237061492009-03-19T10:00:00.000+05:302009-03-19T10:00:00.000+05:30or...A&B cross +2= 2 minA returns +1= 3 minA&a...or...<BR/><BR/>A&B cross +2= 2 min<BR/>A returns +1= 3 min<BR/>A&C cross +5= 6 min<BR/>A returns +1= 7 min<BR/>A&D cross +10= 17 minutes total<BR/><BR/>same answer different explanationAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-3802979373213475425.post-33642468048953417962009-02-22T20:07:00.000+05:302009-02-22T20:07:00.000+05:30Ok, here's the answer; 17 minutes.The trick is...Ok, here's the answer; 17 minutes.<BR/><BR/>The trick is to not have C and D cross separately as that is already 15 minutes.<BR/><BR/>A & B cross + 2 = 2 min<BR/>A returns + 1 = 3<BR/>C & D cross +10 = 13<BR/>B returns + 2 = 15<BR/>A & B cross + 2 = 17 minutesAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-3802979373213475425.post-66879342448960870342009-02-19T06:59:00.000+05:302009-02-19T06:59:00.000+05:30@AshishYou can do better!@Ashish<BR/>You can do better!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3802979373213475425.post-11363300350922541932009-02-17T21:25:00.000+05:302009-02-17T21:25:00.000+05:3019 minutes19 minutesAshishhttps://www.blogger.com/profile/05150982228459497564noreply@blogger.comtag:blogger.com,1999:blog-3802979373213475425.post-38873777237658046502009-02-16T15:16:00.000+05:302009-02-16T15:16:00.000+05:30Ok. The people have to travel across in pairs (bec...Ok. The people have to travel across in pairs (because the bridge is rickety or whatever) but as they only have one light source, one person must bring it back with them, leaving the other on the far side of the bridge (obviously it's too far/risky to throw it back). The limiting factor is that each pair must travel at the speed of the slowest member, so if A and C cross, it will take them 5 mins even tho' A can move faster. However, if A returns with the torch, it will only take them 1 min to come back.<BR/><BR/>I've done this one before so I'm going to let you have another think about it if you like.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3802979373213475425.post-31224142371480061632009-02-15T21:12:00.000+05:302009-02-15T21:12:00.000+05:30@squirrelcan u plz solve thisi dont think that it ...@squirrel<BR/>can u plz solve this<BR/>i dont think that it has any logicAnonymoushttps://www.blogger.com/profile/15574742369899551214noreply@blogger.com