What happened? 317 people die...

[TxHockeyGuy]

Sorry about the strange formatting but the board doesn’t do an outline very well. Man was this a tough one. He is my take on it.

Take three groups of four: A, B, and C. Weigh group A against group B

1. If group A = group B the counterfeit is in group C. Take 3xC and weigh it against 3xA. Set aside one C.

A. If group 3xA=group 3xC then the set aside C that wasn't weighed contains the counterfeit. Weigh one A against un-weighed set aside C to get weight of counterfeit C.

B. If group 3xA>group 3xC then one of 3xC is the counterfeit and light. Weigh C.1 against C.2 set aside C.3. If C.1 = C.2 then C.3 is the counterfeit and is light. If C.1 > C.2 then C.2 is the counterfeit and is light. If C.1 < C.2 then C.1 is the counterfeit and is light.

2. If group A > group B, then group C contains no counterfeit coins and that either group A has a heavy counterfeit or group B has a light counterfeit. Set aside 1xA and 2xB. Move 2xA to group B, Move 1xB to group A. Add 1xC to group A. You are now weighing 1A*+1B+1C against 2A+1B* and setting aside 1xA and 2xB.

A. If 1A*+1B+1C >2A+1B* which was the original uneven weighing. Then 1A* or 1B* are the counterfeits because they are the only element that didn't change. Weigh 1B* against 1C and if 1B*=1C then 1A* is the counterfeit and heavier. If 1B*<1C then it is B* and it is lighter

B. If 1A+1B+1C =2A+1B Then set aside 1xA or 2xB Are the counterfeit. Weigh 2xC against (1xA + 1xB) and set aside B. If (1xA + 1xB) weighs heavy 1xA is the counterfeit and is heavy, if it weighs equal the set aside B is the counterfeit and is light. If it weighs is light then the 1xB being weighed is the counterfeit and light.

C. If 1A+1B+1C <2A+1B which is the opposite of the original mismatch. The 1B in group A and 2A in group B are the counterfeits. Weigh 2xC against 1A + 1B and set aside A. If it weighs heavy A is the counterfeit and is heavy, if it weighs equal the set aside A is the counterfeit and is heavy. If it weighs light B is the counterfeit and light.

I had a little trouble following your answer but I believe it is correct. I was going to write out my solution on here but found a nice online example.

http://home.att.net/~numericana/answer/weighing.htm#weighing

 

[mike_s]

this thread was fun a while back.... I ran across a new riddle that I thought I'd post here instead of opening a new thread..... enjoy.

this is solvable.



ARE YOU IN THE TOP 2% OF INTELLIGENT PEOPLE IN THE WORLD? SOLVE THE RIDDLE AND FIND OUT.

There are no tricks, just pure logic, so good luck and don't give up.

1. In a street there are five houses, painted five different colours.
2. In each house lives a person of different nationality
3. These five homeowners each drink a different kind of beverage, smoke different brand of cigar and keep a different pet.

THE QUESTION: WHO OWNS THE FISH?

HINTS

1. The Brit lives in a red house.
2. The Swede keeps dogs as pets.
3. The Dane drinks tea.
4. The Green house is next to, and on the left of the White house.
5. The owner of the Green house drinks coffee.
6. The person who smokes Pall Mall rears birds.
7. The owner of the Yellow house smokes Dunhill.
8. The man living in the centre house drinks milk.
9. The Norwegian lives in the first house.
10. The man who smokes Blends lives next to the one who keeps cats.
11. The man who keeps horses lives next to the man who smokes Dunhill.
12. The man who smokes Blue Master drinks beer.
13. The German smokes Prince.
14. The Norwegian lives next to the blue house.
15. The man who smokes Blends has a neighbour who drinks water.

ALBERT EINSTEIN WROTE THIS RIDDLE EARLY DURING THE 19th CENTURY. HE SAID THAT 98% OF THE WORLD POPULATION WOULD NOT BE ABLE TO SOLVE IT.

 

[ItsBruce]

this thread was fun a while back.... I ran across a new riddle that I thought I'd post here instead of opening a new thread..... enjoy.

this is solvable.



ARE YOU IN THE TOP 2% OF INTELLIGENT PEOPLE IN THE WORLD? SOLVE THE RIDDLE AND FIND OUT.

There are no tricks, just pure logic, so good luck and don't give up.

1. In a street there are five houses, painted five different colours.
2. In each house lives a person of different nationality
3. These five homeowners each drink a different kind of beverage, smoke different brand of cigar and keep a different pet.

THE QUESTION: WHO OWNS THE FISH?

HINTS

1. The Brit lives in a red house.
2. The Swede keeps dogs as pets.
3. The Dane drinks tea.
4. The Green house is next to, and on the left of the White house.
5. The owner of the Green house drinks coffee.
6. The person who smokes Pall Mall rears birds.
7. The owner of the Yellow house smokes Dunhill.
8. The man living in the centre house drinks milk.
9. The Norwegian lives in the first house.
10. The man who smokes Blends lives next to the one who keeps cats.
11. The man who keeps horses lives next to the man who smokes Dunhill.
12. The man who smokes Blue Master drinks beer.
13. The German smokes Prince.
14. The Norwegian lives next to the blue house.
15. The man who smokes Blends has a neighbour who drinks water.

ALBERT EINSTEIN WROTE THIS RIDDLE EARLY DURING THE 19th CENTURY. HE SAID THAT 98% OF THE WORLD POPULATION WOULD NOT BE ABLE TO SOLVE IT.

Einstein was right about the riddle, but I'm still not convinced about light, relativity or gravity. (He must have been a hoot at a party.)

 

[Cave Diver]

On her first birthday she turned eight. How could this be?

 

[300bar]

Easy

 

[Cave Diver]

Easy

Answer mine. No googling.

 

[mike_s]

Easy

some people I guess don't have the ability to actually solve a riddle.....

 

[Cave Diver]

some people I guess don't have the ability to actually solve a riddle.....

I'm going to print out the clues and work on it later. There was one line that bothered me:

15. The man who smokes Blends has a neighbour who drinks water.

IMO, they are ALL neighbors, but I'm going to work on the assumption this means living directly adjacent to.

 

[Jax]

One day a man received a parcel in the mail. Carefully packed inside was a human arm. He examined it, repacked it and then sent it on to another man. The second man also carefully examined the arm before taking it to the woods and burying it. Why did they do this?

The first man's relative had an artificial arm -- but still human -- and died in a plane crash. The arm was recovered, sent to him for identification. He ID'd it, sent it to the second man, the mortician, who buried it in the woods with the rest of the body.

Right, this one's kind of old...yes/no questions only.
Two dead men in a locked room. A finished game of chess on a table and a gun from which one bullet has been fired. What happened?

^^^ are they on a submarine?

alieight answered yes. Answer?

A man gets up in the middle of the night in his dark room, puts his feet on the floor and screams and then shoots himself. When the police investigate the scene there are no signs of violence, forced entry or anyone else being present during the shooting, but there are 4 piles of sawdust on the floor. What happened?

Answer?

Joe is sitting on a counter afraid of being drunk. Why?

Answer?

On her first birthday she turned eight. How could this be?

Something about a leap second of a leap year?

 

[Jax]

I'm going to print out the clues and work on it later. There was one line that bothered me:

IMO, they are ALL neighbors, but I'm going to work on the assumption this means living directly adjacent to.

ASSUME Nothing! It just Identifies the Drink.