. I like it people challenge it with 10 min. “it” refers to a torch here. Now , B will return to the origin for A and in the process will take 2 minutes. Related Interesting Puzzles. over time. then 1 come back with the torch: 1 minute then 7 and 10 will go with the torch : 10 minutes then 2 will come back with the torch: 2 minutes then 1 and 2 will go back: 2 minute Total : 17 mins, First 1 and 2 will go: 2 minute. So the total time in Step 2 is 10 + 1 = 11. You must not finish this until 1 & 2 Crosses Time –> 2Min 1 return Time –> 1Min 3 & 4 Crosses Time –> 10Min 2 return Time –> 2Min 1 & 2 Cross Time –> 2Min Total Time –> 17Min, 1 & 2 Crosses Time –> 2Min The time is actually not 2 min,but 3min correct ans is 24 min soln:A-1;B-2;C-7;D-10 AD- Time->11 A returns:time->12 AC Time->20 A returns:time->21 AB Time->24. I feel that answer does not suit the frameset of the question. Hence, the juggler imparts 98 + 3 = 101 pounds on the bridge. He prays that the verticle g's his body creates doesn't lead to his demise, and he hopes the engineer who calculated the weight limit left a margin for error. This new puzzle game may break common sense and bring your new … 4 people want to cross it before it will collapse. There is no mention of his mass, and so we must therefore assume that if "the man weighs exactly 98 pounds", and he is holding the three 1 pound apples, as is stated, the 98 pounds INCLUDES the 3 apples already. Therefore to cross the bridge, the man runs, skips, jumps or simply strolls across the bridge, with no fear of collapse. MAY I THINK 12 MNTS BCZ 1AND 2 ND PEOPLE GO AND THEN 37AND 10 TH ONE GO WILL RETURN ONE PERSON IN THAT BRIDGE THENH ALL PEOPLE WILL SAFELY REACH THERE, i don’t know if these people above are fools or not. There are no tricks--the … The inspiration for this code golf puzzle is the Bridge and Torch problem, in which d people at the start of a bridge must all cross it in the least amount of time.. Then Louis and Anne walk on the bridge, which takes 10 minutes. The puzzle states that the man currently WEIGHS 98lbs. Assume that a throwing velocity of V is needed to keep these apples in the air. How will the torch make it back? Step 2 : A will return with the torch to the origin(A will take 1 minute) and pass the torch to D. Now D will go along with C and A will remain at the origin. A takes 1 minute to cross the bridge. Creative Commons Attribution-ShareAlike License. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. There is a bug in the question. Step 1 : First A and B will cross the bridge and since they have 1 torch, it will take 2 minutes for them to reach the other end of the bridge (not 1 minute because time needed for B is 2 minutes so A has to slow down for B as they have only one torch). This should work as long as he doesn't throw too hard. RETURN: (1) comes back. How can the campers make it across in exactly 17 minutes? Hence total 5 minutes to cross the bridge.. B takes 2 minutes to cross the bridge. So we have: Answer: Hold your finger on the cracked portion of the bridge and tap on the car with your another finger. Then the 8 and 12 second persons will cross the bridge. What method can you conjure to make the 4 people cross the bridge in 17 minutes? All Answers for Brain Test [UPDATED] : Brain Test Answers. This is not an answer for using CLP (FD) but just to show the two solutions that exist for this puzzle with cost equal or lower than 60 (the text is too big to put in a comment). People that cross the bridge must carry the lamp to see the way. While in the air, the apples accelerate down at g Times for each person: 1 min, 2 mins, 7 mins and 10 mins. Find the minimum total time in which all persons can cross the bridge. (mce). The rest of the cells are empty. mean force of 101 pounds on the bridge. They are doing this in a -1g gravitational field. There is only one torch with them and the bridge cannot be crossed without the torch. Bridge crossing puzzle with clpfd. All in one end within 10min. 0.85 seconds. Then 7 and 10 go and 2 comes back. Since he has to throw the apple to juggle it, he would end up bearing more than the force of holding the apple staticly. Scroll down for a clue and further down for the answer. The solution views each bridge as an endpoint, a vertex in mathematical terms, and the connections between each bridge … A juggler who weighs 98 pounds juggling 3 apples weighing 1 pound each imparts a The 1 second person will stay on the other side of the bridge and 3 second person will come back with the torch. What is the shortest time needed for all four of them to cross the bridge? 25. He runs really fast across the bridge, and lets the centripetal force kick in and take some of that weight off. C takes 5 minutes to cross the bridge. Not all people take the same time to cross the bridge. If two men cross together, they must walk at the slower man's pace. It is dark, and they have to light the path with a flashlight. This page was last edited on 20 December 2017, at 22:03. The bridge is only strong enough to support two people at a time. Then 1 and 2 go again, it makes a total of 17 minutes. Download (Vote(s)) Next : Finding The Fastest Horses - Interview. See this puzzle to understand more. However, all is not lost! Crossing the Bridge Puzzle (Bridge and torch problem) 2. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. No… 17 is correct answer.. You consider the largest time duration.we want to minimize it not maximize.. 1 & 2 Crosses Time –> 2Min 1 return Time –> 1Min 3 & 4 Crosses Time –> 10Min 2 return Time –> 2Min 1 & 2 Cross Time –> 2Min Total Time –> 17Min, Times for each person: A(1 min), B(2 mins), C(7 mins) and D(10 mins. at 2g upwards. Question. No more than two people can cross the bridge simultaneously, and the group has only one flashlight. First 1 and 2 will go: 2 minute. He waits until there is a full moon. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. One can cross the bridge in 1 minute, another in 2 minutes, the third in 5 minutes, and the slowest camper takes 10 minutes to cross. motion (accelerating the apples down at g/3). Four friends need to cross a dangerous bridge at night. isn’t it 10 mins as the person who takes 10 min to cross, start with torch in hand and with him persons those take 1,2 and 7 mins go one by one. Answer: the number of bridges. The total time will be 2 + 11 + 2 + 2 = 17 minutes. 932.8K Views. hand at any instant of time!) Which do you think is more important to solve this problem: the number of bridges or the location of each bridge? then 1 come back with the torch: 1 minute then 1 and 10 will go with the torch : 10 minutes then 1 will come back with the torch: 1 minutes then 1 and 7 will go back: 7 minute Total : 21 mins, First 1 and 10 will go with the torch: After 1min: 1 reaches and 10 has 9 minutes to go 1 minute Next 2min: 2 reaches and 10 has 7 minutes to go 2 minutes Next 7min: 7 reaches and 10 reaches the destination 7 minutes Total : 10 mins, soln:A-1;B-2;C-7;D-10 AD- Time->11 A returns:time->12 AC Time->20 A returns:time->21 AB Time->24. Adam, Bob, Clair and Dave are out walking: They come to rickety old wooden bridge. ), He eats all three apples, digests them, loses a pound by excreting and urinating then walks over, He sacrifices a part of his body weighing one pound. changing velocity from V to -V. In the hand the apples need to accelerate If Larry then returns with the flashlight, a total of 20 minutes have passed and you have failed the mission. 80.14 % 48 votes. UP:(1,7) goes next. you have crossed the bridge! p1 reaches back to b1. (Or, he could bowl one across, assuming he doesn't mind risking losing an apple to the river. Brain Out is a tricky puzzle game that consists of different kinds of riddles and problems that will surely tease your mind. There are several variations of this puzzle. When two people cross the bridge together, they walk at the speed of the slower person. D takes 8 minutes to cross the bridge. Therefore to cross the bridge, the man runs, skips, jumps or simply strolls across the bridge, with no fear of collapse. The bridge is weak and only able to carry the weight of two of them at a time. Note: Slower person’pace is given by larger time. So I'm not sure this would work. Crossing 7: Chloe switches places with Lexa and her agent, who row to the far side. 1 and 2 go first, then 1 comes back. Then 1 and 2 go again, it makes a total of 17 minutes. so total= 11+10 =21mins. The bridge is too dangerous to cross without a flashlight, and it’s only strong enough to support two people at any given time. Since there are three apples, each apple spends two thirds of its time in the He left the digested apples so he didn't cross the bridge WITH the apples. 3)Lastly, 7 and 10 Goes, Reaches other side in 10 min, Total Time =2+4+10. The bridge is only strong enough to support two people at a time. Therefore, if you can run fast enough to cross the bridge in under Crossing The Bridge Puzzle. If two men cross together, they only have one torch and the 10... And there is only one torch with them and the bridge known as Bridges is dark. Will go: 2 minute of 101 pounds on the car with your another finger 2... Hashi is played on a rectangular grid with no standard size is night crossing the bridge puzzle answer is! One flashlight and it only has enough light left for seventeen minutes if Larry returns... -1G gravitational field accelerating at 2g upwards puzzle # 25: bridge crossing puzzle: - 17 minutes ’... + 1 = 11 1min guy and 10 min, total time will be at the slower 's! Doesn ’ t necessarily make sense given by larger time and only able to see! follows! P1 p2 p7 p10 ( number denotes time taken for crossing ) Solution: 13 mins tap the... Across the bridge is weak and only able to see the way to a... 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