## Ultimate Riddles

This is the KiasuParents' Playground. If you wish to start some forum-based games, you're most welcome to create them in here! All discussions about music and movies will be kept in this Forum too.

### Ultimate Riddles

I created this topic so that everyone of you can enjoy the riddles posted. Some of them are at http://www.kiasuparents.com/kiasu/forum/viewtopic.php?t=7234&postdays=0&postorder=asc&start=60 but there are still plenty of riddles I have in mind. They are bound to let you say:"Why didn't I think of that?" ( readers can also post riddles )
Last edited by quickmind on Tue Mar 02, 2010 6:26 pm, edited 1 time in total.

quickmind
GreenBelt

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Right, lets get started. This will be my first question:

You have a barrel of oil , and you need to measure out just one gallon. How do you do this if you only have a three-gallon container and a five-gallon container?

quickmind
GreenBelt

Posts: 141
Joined: Wed Jan 20, 2010 7:06 pm
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Solved it or not, try the next question:

U2 has a concert that starts in 17 minutes and they must all cross a bridge to get there. All four men begin on the same side of the bridge. You must help them across to the other side. It is night. There is one flashlight. A maximum of two people can cross at one time. Any party who crosses, either 1 or 2 people, must have the flashlight with them.

The flashlight must be walked back and forth. It cannot be thrown and other tricks like that are not needed to solve the problem. The solution is simply a matter of allocating resources in a certain order. Each band member walks at a different speed. A pair must walk together at the rate of the slower man's pace:

Bono: 1 minute to cross
Edge: 2 minutes to cross
Larry: 10 minutes to cross

For example: if Bono and Larry walk across first, 10 minutes have elapsed when they get to the other side of the bridge. If Larry then returns with the flashlight, a total of 20 minutes have passed and you have failed the mission.

quickmind
GreenBelt

Posts: 141
Joined: Wed Jan 20, 2010 7:06 pm
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quickmind wrote:Right, lets get started. This will be my first question:

You have a barrel of oil , and you need to measure out just one gallon. How do you do this if you only have a three-gallon container and a five-gallon container?

This was solved in Die Hard 3! Oh wait...are you too young to know that movie?

There are 2 ways to solve this:
1. Fill 3, pour into 5.
2. Fill 3 again, and pour 2 more gallons into 5.
3. 1 gallon remains in 3.

2nd way but a bit long winded:
1. Fill 5, pour into 3.
2. Throw away 3, pour remaining 2 from 5 into 3.
3. Fill 5 again, pour 1 from 5 to 3. 4 left in 5.
4. Throw away 3, then fill 3 with the 4 left in 5. What remains in 5 is 1 gallon of oil.

BigDevil
ClassMonitor

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quickmind wrote:U2 has a concert that starts in 17 minutes.....

Bono, Edge 2 mins
Bono returns 1 min
Edge returns 2 mins
Bono, Edge 2 mins

Total 17mins.

BigDevil
ClassMonitor

Posts: 9277
Joined: Thu Jul 02, 2009 6:30 pm
Total Likes: 31

BigDevil wrote:
quickmind wrote:Right, lets get started. This will be my first question:

You have a barrel of oil , and you need to measure out just one gallon. How do you do this if you only have a three-gallon container and a five-gallon container?

This was solved in Die Hard 3! Oh wait...are you too young to know that movie?

There are 2 ways to solve this:
1. Fill 3, pour into 5.
2. Fill 3 again, and pour 2 more gallons into 5.
3. 1 gallon remains in 3.

2nd way but a bit long winded:
1. Fill 5, pour into 3.
2. Throw away 3, pour remaining 2 from 5 into 3.
3. Fill 5 again, pour 1 from 5 to 3. 4 left in 5.
4. Throw away 3, then fill 3 with the 4 left in 5. What remains in 5 is 1 gallon of oil.

Never heard of it.( I know it because this is a Math Olympiad question ) But you got it correct!!!

quickmind
GreenBelt

Posts: 141
Joined: Wed Jan 20, 2010 7:06 pm
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BigDevil wrote:
quickmind wrote:U2 has a concert that starts in 17 minutes.....

Bono, Edge 2 mins
Bono returns 1 min
Edge returns 2 mins
Bono, Edge 2 mins

Total 17mins.

Man, I really need harder riddles to defeat a riddle knig like you!!!

quickmind
GreenBelt

Posts: 141
Joined: Wed Jan 20, 2010 7:06 pm
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Why don't you post a riddle, Big Devil????

quickmind
GreenBelt

Posts: 141
Joined: Wed Jan 20, 2010 7:06 pm
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Here, try this:

A toaster can toast two bread at the same time. One side of the bread would take one minutes to be fully toasted.( Every bread has a top side and a bottom side ) How long does it take to toast three bread???

quickmind
GreenBelt

Posts: 141
Joined: Wed Jan 20, 2010 7:06 pm
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quickmind wrote:Why don't you post a riddle, Big Devil????

I only like to solve riddles and puzzles.

BigDevil
ClassMonitor

Posts: 9277
Joined: Thu Jul 02, 2009 6:30 pm
Total Likes: 31

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