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
Thirteen Hearts Riddle
Hint:
A Time To Travel Riddle
Hint:
Center Of Everything Riddle
There is one word that stands the test of time and holds fast to the center of everything. Though everyone will try at least once in their life to move around this word, but in fact, they use it every moment of the day. Young or old, awake or in sleep, human or animal, this word stands fast. It belongs to everyone, to all living things, but no one can master it. The word is?
Hint:
The Nosy Old Woman
My neighbors think I'm a nosy old woman, but today I witnessed a murder. I was looking out my window when I saw something through the window of the apartment building opposite me. A man was in the middle of murdering a woman. The strange thing was, after he finished strangling her, he turned around and our eyes met. It was eerie. Then he pointed at me and kept staring at me for a minute or two. All the time he was staring at me, his finger kept moving. I called the police a few minutes ago and they told me I will have to go down to the police station and give a statement tomorrow. I'm sure they will catch him. I saw his face very clearly.
What do you think the murderer was waving his finger at?
What do you think the murderer was waving his finger at?
Hint:
The murderer was counting the windows to see which floor the old woman was on. He is coming to kill her. 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
Safely Across The Stream
A farmer was going to town with a fox, a goose and a sack of corn. When he came to a stream, he had to cross in a tiny boat, and could only take across one thing at a time. However, if he left the fox alone with the goose, the fox would eat the goose, and if he left the goose alone with the corn, the goose would eat the corn. How does he get them all safely over the stream?
Hint:
He takes the goose across first, then comes back. Then he takes the fox across and brings the goose back. Then he takes the corn over. Finally he comes back alone and takes the goose across. Did you answer this riddle correctly?
YES NO
YES NO
A Sound Economic Reason
You will know that I am coming from the jingle of my bell, but exactly who I am is not an easy thing to tell. Children, they adore me for they find me jolly, but I do not see them when the halls are decked with holly.
My job often leaves me frozen, I am a man that all should know, but I do not do business in times of sleet or ice or snow. I travel much on business, but no reindeer haul me around, I do all my traveling firmly on the ground.
I love the time of Christmas, but that's not my vocational season, and I assure that is because of a sound economic reason.
Who am I?
My job often leaves me frozen, I am a man that all should know, but I do not do business in times of sleet or ice or snow. I travel much on business, but no reindeer haul me around, I do all my traveling firmly on the ground.
I love the time of Christmas, but that's not my vocational season, and I assure that is because of a sound economic reason.
Who am I?
Hint:
Christmas Cat Riddle
Hint:
Friday Night Fun Riddle
Hint:
I Join You In Battle Riddle
I join you in battle, fist clenched tight.
We pound three times with all our might.
If my rival decides he will sign for peace;
I'll crush him, and the fight will cease.
But if he lays his hand down flat;
I'll suffer defeat, that is that.
What am I?
We pound three times with all our might.
If my rival decides he will sign for peace;
I'll crush him, and the fight will cease.
But if he lays his hand down flat;
I'll suffer defeat, that is that.
What am I?
Hint:
Mail Time Birds Riddle
Hint:
12 Numbers Riddle
Hint:
Black On Black Riddle
How did the driver see the man?
Hint:
An Icy Treat You Know
You will know that I am coming from the jingle of my bell, but exactly who I am is not an easy thing to tell. Children, they adore me for they find me jolly, but I do not see them when the halls are decked with holly.
My job often leaves me frozen, I am a man that all should know, but I do not do business in times of sleet or ice or snow. But I have a cold and icy treat you definitely know. I travel much on business, but no reindeer haul me around, I do all my traveling firmly on the ground.
I love the time of Christmas, but that's not my vocational season, and I assure that is because of a sound economic reason.
Who am I?
My job often leaves me frozen, I am a man that all should know, but I do not do business in times of sleet or ice or snow. But I have a cold and icy treat you definitely know. I travel much on business, but no reindeer haul me around, I do all my traveling firmly on the ground.
I love the time of Christmas, but that's not my vocational season, and I assure that is because of a sound economic reason.
Who am I?
Hint:
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