A Rickety Bridge Riddle
Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?
Hint:
17 mins.
The initial solution most people will think of is to use the fastest person as an usher to guide everyone across. How long would that take? 10 + 1 + 7 + 1 + 2 = 21 mins. Is that it? No. That would make this question too simple even as a warm up question.
Let's brainstorm a little further. To reduce the amount of time, we should find a way for 10 and 7 to go together. If they cross together, then we need one of them to come back to get the others. That would not be ideal. How do we get around that? Maybe we can have 1 waiting on the other side to bring the torch back. Ahaa, we are getting closer. The fastest way to get 1 across and be back is to use 2 to usher 1 across. So let's put all this together.
1 and 2 go cross
2 comes back
7 and 10 go across
1 comes back
1 and 2 go across (done)
Total time = 2 + 2 + 10 + 1 + 2 = 17 mins Did you answer this riddle correctly?
YES NO
The initial solution most people will think of is to use the fastest person as an usher to guide everyone across. How long would that take? 10 + 1 + 7 + 1 + 2 = 21 mins. Is that it? No. That would make this question too simple even as a warm up question.
Let's brainstorm a little further. To reduce the amount of time, we should find a way for 10 and 7 to go together. If they cross together, then we need one of them to come back to get the others. That would not be ideal. How do we get around that? Maybe we can have 1 waiting on the other side to bring the torch back. Ahaa, we are getting closer. The fastest way to get 1 across and be back is to use 2 to usher 1 across. So let's put all this together.
1 and 2 go cross
2 comes back
7 and 10 go across
1 comes back
1 and 2 go across (done)
Total time = 2 + 2 + 10 + 1 + 2 = 17 mins Did you answer this riddle correctly?
YES NO
Hawaiian Islands Riddle
Hint:
Ancient Invention Riddle
There is an ancient invention still used in some parts of the world today that allows people to see through walls.What is it?
Hint:
Invited To Dinner Riddle
A few days ago, I was invited to dinner at a friend's house. The strange thing is, my friend recently got involved with some weird religious cult. While I was there, he served up some type of meat, but he wouldn't tell me what kind of meat it was. It kind of freaked me out. For a second, I wondered if it was human meat, but then, after I ate it, I knew it definitely wasn't human meat.
What's really going on?
What's really going on?
Hint:
The guy who was invited over was a cannibal. How else would he have known it wasn't human meat if he'd never had human meat to begin with? Did you answer this riddle correctly?
YES NO
YES NO
Crossing The Bridge Riddle
There are two villages separated with a river. Each day, four people cross the river through a bridge to work on the other side and earn for their families. On one night when they were returning from work, they noticed that the bridge was about to collapse. Now all of them wanted to cross the bridge before it collapsed as no one wanted to be stuck on that end without their families.
They had just one torch with them and since it was the night time, they could not see without it. The bridge had become weak and it could only accommodate two people at a time. It was going to collapse in just 17 minutes.
The four people took different times to cross the bridge. First one took only a minute, second one took 2 minutes, third one took 5 minutes and the last one took 10 minutes.
How would all of them have managed to cross the bridge in time?
They had just one torch with them and since it was the night time, they could not see without it. The bridge had become weak and it could only accommodate two people at a time. It was going to collapse in just 17 minutes.
The four people took different times to cross the bridge. First one took only a minute, second one took 2 minutes, third one took 5 minutes and the last one took 10 minutes.
How would all of them have managed to cross the bridge in time?
Hint:
Let us denote the four people with A, B, C and D.
A takes 1 minute to cross, B takes 2, C takes 5 and D takes 10.
A and B cross first spending 2 minutes.
A comes back with torch taking 1 minute.
C and D cross taking 10 minutes.
B comes back with torch taking 2 minutes.
Finally, A and B cross the bridge taking 2 minutes.
2 + 1 + 10 + 2 + 2 = 17 minutes
Thus, this is the way they all managed to cross that bridge that night. Did you answer this riddle correctly?
YES NO
A takes 1 minute to cross, B takes 2, C takes 5 and D takes 10.
A and B cross first spending 2 minutes.
A comes back with torch taking 1 minute.
C and D cross taking 10 minutes.
B comes back with torch taking 2 minutes.
Finally, A and B cross the bridge taking 2 minutes.
2 + 1 + 10 + 2 + 2 = 17 minutes
Thus, this is the way they all managed to cross that bridge that night. Did you answer this riddle correctly?
YES NO
The Indian Potato Riddle
Hint:
A Writing Instrument Riddle
Im sometimes pink at one end but Im not lipstick
I can come in many different colors but Im not a car
I can become blunt but Im not a knife
I contain lead but Im not metallic
Im a writing instrument but Im not a pen
I am a?
I can come in many different colors but Im not a car
I can become blunt but Im not a knife
I contain lead but Im not metallic
Im a writing instrument but Im not a pen
I am a?
Hint:
Inspiring An Artist Riddle
Hint:
12 Inch Turd Riddle
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Iguanodon's Favorite Toy Riddle
Hint:
The Non Digital Clock Riddle
Calculate the number of degrees between the hour hand and the minute hand of a clock (nondigital) that reads 3:15.
Hint:
The hour hand will have moved one-fourth of an hour; therefore, there will be 7.5 degrees between the two hands. Did you answer this riddle correctly?
YES NO
YES NO
An Independent Republic Riddle
I was once an independent republic. I am the second largest US state by population, and the Battle of the Alamo was pivotal to my history. What state am I?
Hint:
Yellow Outside Gray Inside Riddle
Hint:
Snakes Out Of Ireland Riddle
Hint:
The Illegal Substance Riddle
Hint:
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