trick math ?, ---a group of 4 people have to cross a bridge? It is dark and 1 torch. The bridge is too dangerous to cross without a flashlight, and … If you would like to participate in the growth of our online riddles and puzzles resource, please become a member and browse our riddles. Help all of these family members to cross the bridge within 30 seconds. Unfortunately, they only have one flashlight and it only has enough light left for seventeen minutes. GINA (1 sec) KEN (2 sec) LISA (4 sec) TOM (6 sec) CINDY (8 sec) OMAN (12 sec) GO! The bridge must be crossed with the flashlight and can only support two bankers at a time. Most suspension bridges have a truss system beneath the roadway to resist bending and twisting. Well, if only 1 person can pass each time, it will take 21 minutes, but 2 people can cross the bridge at the same time, so the minimum optimal time is 10.5 (assume that the bridge has 2 people crossing at any given time, which is impossible if t is not integer), and we can tell that the optimal solution is integer. The difficulty of the puzzle may arise from restrictions on which or how many items can be transported at the same time, or which or how many items may be safely left together. It is a dark night and there is only one torch between them. The five people take different times to cross the bridge. Question: What tastes better than it smells? The bridge is too dangerous to cross without a flashlight, and it’s only strong enough to support two people at any given time. What is the shortest time needed for all four of them to cross the bridge ? Total time taken = 2 + 2 + 10 + 1 + 2 = 17 mins. The goal and mission of GoodRiddlesNow.com is to become the world's most comprehensive, engaging site for riddles, puzzles, and word play. Because of its dilapidated condition, the bridge can only support up to 2 people at any given time. Four people need to cross a bridge in 17 minutes in the middle of the night. A dental bridge may need to be replaced every 5 to 15 years, depending on … The times each needs to cross it are: 5 min, 10 min, 20 min, and 25 min. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. B also wanted to kill C (not knowing that the water of C had been already poisoned) and so B made a hole into the sack of C and the water spilt out. There is only one torch with them and the bridge … Next Sally and Connor will cross (10 minutes). There are four people who need to cross a rickety bridge in 17 minutes. Connor n Sally they take only 10mins , John returns with the light(2min). Puzzle: There are 4 persons (A, B, C and D) who want to cross a bridge in night. It is night and there is one flashlight. If Larry then returns with the flashlight, a total of 20 minutes have passed and you have failed the mission. seconds. Four people need to cross a rickety rope bridge to get back to their camp at night. A group of four people has to cross a bridge. 1:100 (Bilder: Thierry Berset und Luc Trausch) stresshead.ch. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. It is night and they have just 1 lamp. The suspension bridge... can span 2,000 to 7,000 feet -- way farther than any other type of bridge! The bridge must be crossed with the flashlight and can only support two bankers at a time. 2 + 1 + 10 + 2 + 2 = 17 minutes. Many dental insurance plans cover bridges, and many now cover implants as well. Only one or two characters allow crossing the bridge at the same time. So total time 15mins. Any party who crosses, either 1 or 2 people… Puzzle 17 | (Ratio of Boys and Girls in a Country where people want only boys), Puzzle 81 | 100 people in a circle with gun puzzle, Check whether jigsaw puzzle solveable or not, Ratio of area of one circle to the equilateral triangle when three equal circles are placed inside an equilateral triangle, Data Structures and Algorithms – Self Paced Course, Ad-Free Experience – GeeksforGeeks Premium, We use cookies to ensure you have the best browsing experience on our website. What is the fastest time you can get everyone across? They have only one flashlight and 17 minutes to get there. See your article appearing on the GeeksforGeeks main page and help other Geeks. \n3rd. RESET! Only two people can go over the bridge at one time. Help all of these family members. Question: Four people need to cross a bridge in 17 minutes in the middle of the night. A group of four has to cross a bridge. Any party who crosses, either one or two people, must have the flashlight with them. \n2nd. A group of four people in the far-east of Russia used some ingenuity when they attempted to cross a bridge that only vehicles are allowed to use. >Four people need to cross a rickety bridge at night. A hated C and decided to kill him - he poisoned the water in his sack (only C had water). It is night and they have just one lamp. That would make this question too simple even as a warm up question. (2 minutes) Edge goes over (4 minutes) & give the flashlight to Larry and Adam. Because of its dilapidated condition, the bridge can only support up to 2 people at any given time. Answer to Puzzle #25: Bridge crossing in 17 Minutes with Torch. Maybe we can have 1 waiting on the other side to bring the torch back.This brings us closer to the solution. Question: What two things can you never eat for breakfast? Unfortunately, they only have one flashlight and it only has enough light left for seventeen minutes. Time and Distance - Quantitative aptitude tutorial with easy tricks, tips, short cuts explaining the concepts. ), Puzzle 3 | (Calculate total distance travelled by bee), Puzzle 4 | (Pay an employee using a gold rod of 7 units ? They have 17 minutes before the zombies arrive and all four people must be on the other side of the bridge. They each take 1, 2, 5 and 8 minutes. A Rickety Bridge Riddle. stresshead.ch . Each Running At A Maximum Speed; One Person Can Cross The Bridge In 1 Minute, The Second In 2 Minutes, The Third In 5 Minutes, And The Last In 10 Minutes. Four friends need to cross a bridge. If you are a U.S. citizen crossing into the United States from Mexico by land without a U.S. passport, you may be slowing down the lines and increasing your wait time. Unfortunately, they have one torch and the bridge is to dangerous to cross without a torch. One takes 1 second to cross the bridge. Cross the Bridge is a Free IQ Game powered by jQuery and HTML5. Need to cross a bridge.. A maximum of 2 people can cross at a time.. The people have one flashlight, which needs to be held by any group crossing the bridge because of how dark it is. 4 people must cross a bridge in 17 minutes. Question : Four people need to cross a rickety bridge at night. ; In places, the road narrows abruptly to one lane as it crosses bridges. The flashlight can only travel with a person so every time it crosses the bridge it … Unfortunately, they have one torch and the bridge is to dangerous to cross without a torch. The others take 3 seconds, 6 seconds, 8 seconds and 12 … The bridge is too dangerous to cross without a flashlight, and it’s only strong enough to support two people at any given time. 1 or 2 people… the puzzle is four people need to cross are! Are four people come to a meeting and many now 4 persons need to cross a bridge implants as.. 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