How can you get a group of people across a bridge in a certain amount of time? Most importantly, everyone must be safely across before the zombies arrive.


HEGARTYMATHS math videos on YouTube! Videos for the

So that's a dead end, which means that at the third crossing, only the two lions can go.

Ted ed bridge crossing riddle. February 23, 2016 at 6:43 am. Which gives you just enough time to cut the ropes of the bridge so the zombies can't get at you. Most importantly, everyone must be safely across before the zombies arrive.

Pause this video to try and figure it out yourself! No more than two people can cross the bridge together, anyone crossing must either hold the lantern or stay right next to it, and any of you can safely wait in the dark on either side of the gorge. The bridge and torch problem (also known as the midnight train and dangerous crossing) is a logic puzzle that deals with four people, a bridge and a torch.

Can you solve the temple riddle? The bridge is weak and only able to carry the weight of two of them at a time. Because they are in a rush and the light is fading they must cross in the minimum time possible and must carry a torch (flashlight,) on each crossing.

Adam, bob, clair and dave are out walking: I gave up because it looked impossible. It took 20 minutes to cross the bridge from one side to the other and 10 minutes each way from the guards tower.

They come to rickety old wooden bridge. There are four people who need. If two wildebeest go, the one that stays will get eaten, and if one of each animal goes, the wildebeest on the raft will be outnumbered as soon as it reaches the other side.

The giant sandglass begins flowing with less than an hour before it empties, and a rumbling. (zombies!) last weekend i was at the interface conference in osage beach, mo. You can dash across in a minute, while the lab assistant takes two minutes.

There were no hiding spots on the bridge so people couldn’t sneak past, and the guard comes out every 5 minutes or so to check to see if anyone is trying to cross. Each person can cross the bridge at a different rate: One gets dropped off, leaving two lions on the left bank.

One person takes 1 minute, one person takes 2 minutes, one takes 5 minutes, and the one person takes 10 minutes. Finally, there are no tricks to use here. Across an old rope bridge spanning a massive gorge.

Otherwise, the first zombie could step on the bridge while people are still on it. Variations of the problem have appeared for decades, each with different numbers and times, but it is possible to work out a formal mathematical solution for any of the values you plug in. Here's the complete video featuring the full riddle and its solution.

The people have one flashlight, which needs to be held by any group crossing the bridge because of how dark it is. It is in the category of river crossing puzzles, where a number of objects must move across a river, with some constraints. Stay tuned for a new ted ed puzzle coming out soon!

Make sure to visit their youtube channel for more videos, and, to support their work for students, you can visit their patreon. While attending a session on saturday morning, a fellow participant shared this lovely problem with me. Pulling that lever with the skull symbol just to see what it did probably wasn’t so smart either.

But as you study the inscriptions in the darkness, two wisps of green smoke burst forth. Taking that internship in a remote mountain lab might not have been the best idea. Can you solve the bridge riddle?

Then hit play to find out the answer. Your expedition finally stands at the heart of the ancient temple. The bridge is rickety and can only support 2 people at a time.

Can you solve the bridge riddle? Person a can get across in one minute, person b in two minutes, person c in five, and person d, who presumably has no legs, takes ten. The walls begin to shake.

If you enjoyed the lions and wildebeest problem, then you will probably like another riddle posed by alcuin called the problem of the wolf, the. Anyone crossing must either hold the lantern or stay right next to it, and any of you can safely wait in the dark on either side of the gorge. Most importantly, everyone must be safely across before the zombies arrive.

This is the ‘bridge and torch’ problem, an example of the wider category of ‘river crossing puzzles.’ read about other examples and their history here. You’ve gotten a headstart, but there’s only one way to safety: No more than two people can cross the bridge together, anyone crossing must either hold the lantern or stay right next to it, and any of you can safely wait in the dark on either side of the gorge.

Lisa winer wrote this math and logic lesson based on the classic river crossing puzzle variations (like the fox, chicken, and bag of grain puzzle) attributed to alcuin. In both cases you seem to have to take back some of the progress you have made to finish the crossing task. This riddle’s solution is similar to the following one, the river crossing riddle.

The only way across to each town was by a long bridge with a guard post in the middle. But now is not the time for regrets because you need to get away from these mutant zombies.fast. The set up is this:

Another version of this riddle that had an island in between the riverbanks was considered in the 19 th century.


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