What do you think?

Chancie · 10-15-2010, 02:57 PM

Quote:

Originally Posted by Rockinonahigh

It depends if all the coins are of the same sise and ammout of value,some coins are made of diffent metals so weight is diffrent on each.
My soulution(sp?) would be to seprate all the coins to theire monatary amount value,then look at them very carefuly,then pick out the ones I think may not be real.Then drop them on the table one at the time till one dosent sound the same when it hits the table.Result is u dont need to use the scale at all to find the counterfit coin. u find the fake coin and save $$ not useing the scale.

The coins appear identical.

The only difference between the valuable real coins and the counterfeit coin is that

The fake coin is either heavier or lighter than the real coins.

Dreamer · 10-15-2010, 03:13 PM

Quote:

Originally Posted by Chancie

The coins appear identical.

The only difference between the valuable real coins and the counterfeit coin is that

The fake coin is either heavier or lighter than the real coins.

Okay my process of elimination and I am sure there is a better way but,
I would put 50 coins on each side of the scale, then take either the lighter or heavier side and divide them into 25 coins, if they weighed even then the counterfeit coin is amongst the other 25 coins, if they weighed uneven the counterfeit coin is amongst that 25. I would continue dividing the coins into equal amounts until I was left with only the counterfeit coin. Or you could just bite them and see if you were left with teeth marks

And if this makes no sense then I blame it on being aussie ty

Chancie · 10-15-2010, 03:13 PM

The difference between the real coins and the fake coin is too subtle to tell with your hands.

Your task is find a way to use the balance scale efficiently.

ETA: Dreamer and I posted at the same time.

Soft*Silver · 10-15-2010, 03:56 PM

I am horrible at these kind of problems but I love them.Please post the answer even if no one gets it!

LipstickLola · 10-15-2010, 04:06 PM

This might as well be the "one train leaves the NY station at 10 am doing 100 mph, one train leaves Chicago at 10 am doing 150 mph, what time do they intersect in.....Timbucktoo?"

theoddz · 10-15-2010, 04:44 PM

Ooooo.....I love love LOVE these kinds of problems!!!!

Wish I'd gotten in on this one a bit sooner.

~Theo~

.....loves puzzles and problem-solving exercises.

rlin · 10-15-2010, 05:19 PM

i imagine that halving them til you get to the winner is the better idea... if the scale has to be used and they are identical i believe that would be the best bet...
of course... i am sure that there must be something else that works better... because that just sounds too logical and easy...

Soft*Silver · 10-15-2010, 05:28 PM

Take 1 known genuine coin by weight. Divide the rest into 3 of 33 and weight them. The pile that is lighter or heavier gets cut into 3rds till you single it out.

JAGG · 10-15-2010, 05:39 PM

Well the question is ambiguous .If you have to pay each time you use the scale, does putting them on and then off count as one time or two? Also if you have to pay everytime you use the scale what's the goal here, what's the object of this quest? To spend the least amount of money possible in your quest, or is the goal to find out which coin is bogus? Anyway I have about 20 more questions because your details are not very clear. But here's my answer. Assumming putting all the coins on the scale counts as a one time use , and taking them all off counts as an additional use, I'd put all the coins on the scale. ( that's one time) Then I'd take them off one at a time, watching the scale for the difference in weights. (For example the first 15 I took off, all weighted 3 ounces each but the 16th one weighted 2 ounces, and the next 4 I took off weighted 3 ounces, I'd set the one that weightes 2 ounces aside) I'd set the different one aside and finished taking the other coins off, that would count as the second use of the scale. So 2 times I'd use the scale. If putting them on and off counts as one time use then I only used the scale once.

homoe · 04-26-2021, 03:42 PM

Quote:

Originally Posted by LipstickLola

This might as well be the "one train leaves the NY station at 10 am doing 100 mph, one train leaves Chicago at 10 am doing 150 mph, what time do they intersect in.....Timbucktoo?"

I have NO idea but if it's safe to travel you can bet I'd be on that damn train!

10-15-2010, 03:56 PM	#4
SoftSilver Infamous Member How Do You Identify?: femme Preferred Pronoun?: she Relationship Status: Married Join Date: Nov 2009 Location: rose cottage Posts: 5,592 My Photo Gallery Thanks: 8,948 Thanked 15,908 Times in 4,062 Posts Rep Power*: 21474857	I am horrible at these kind of problems but I love them.Please post the answer even if no one gets it! __________________ Pole bachit, a lis chuye. The field sees, the forest hears

10-15-2010, 04:06 PM	#5
LipstickLola Member How Do You Identify?: Happy Preferred Pronoun?: she Join Date: Sep 2010 Location: planet Earth Posts: 682 My Photo Gallery Thanks: 1,679 Thanked 1,597 Times in 433 Posts Rep Power: 5678217	This might as well be the "one train leaves the NY station at 10 am doing 100 mph, one train leaves Chicago at 10 am doing 150 mph, what time do they intersect in.....Timbucktoo?" __________________ Happiness......it's a choice!!

10-15-2010, 04:44 PM	#6
theoddz Senior Member How Do You Identify?: Cranky Old Poop Preferred Pronoun?: Mr. Beast Relationship Status: Married Join Date: Nov 2009 Location: Central Texas Posts: 3,537 My Photo Gallery Thanks: 11,111 Thanked 9,928 Times in 2,508 Posts Rep Power: 21474855	Ooooo.....I love love LOVE these kinds of problems!!!! Wish I'd gotten in on this one a bit sooner. *~Theo~* .....loves puzzles and problem-solving exercises. __________________ *"All that is gold does not glitter, Not all those who wander are lost; The old that is strong does not wither, Deep roots are not reached by the frost."* -- J. R. R. Tolkien

10-15-2010, 05:28 PM	#8
SoftSilver Infamous Member How Do You Identify?: femme Preferred Pronoun?: she Relationship Status: Married Join Date: Nov 2009 Location: rose cottage Posts: 5,592 My Photo Gallery Thanks: 8,948 Thanked 15,908 Times in 4,062 Posts Rep Power*: 21474857	Take 1 known genuine coin by weight. Divide the rest into 3 of 33 and weight them. The pile that is lighter or heavier gets cut into 3rds till you single it out. __________________ Pole bachit, a lis chuye. The field sees, the forest hears

10-15-2010, 05:39 PM	#9
JAGG Infamous Member How Do You Identify?: Butch Preferred Pronoun?: JAGG Relationship Status: =) Join Date: Nov 2009 Location: Tulsa (cat free zone) Posts: 6,093 My Photo Gallery Thanks: 18,651 Thanked 17,531 Times in 4,137 Posts Rep Power: 21474858	Well the question is ambiguous .If you have to pay each time you use the scale, does putting them on and then off count as one time or two? Also if you have to pay everytime you use the scale what's the goal here, what's the object of this quest? To spend the least amount of money possible in your quest, or is the goal to find out which coin is bogus? Anyway I have about 20 more questions because your details are not very clear. But here's my answer. Assumming putting all the coins on the scale counts as a one time use , and taking them all off counts as an additional use, I'd put all the coins on the scale. ( that's one time) Then I'd take them off one at a time, watching the scale for the difference in weights. (For example the first 15 I took off, all weighted 3 ounces each but the 16th one weighted 2 ounces, and the next 4 I took off weighted 3 ounces, I'd set the one that weightes 2 ounces aside) I'd set the different one aside and finished taking the other coins off, that would count as the second use of the scale. So 2 times I'd use the scale. If putting them on and off counts as one time use then I only used the scale once. __________________ I don't want to spend my life with someone I can live with, I want to spend my life with someone I can't live without.

10-15-2010, 03:13 PM	#3
Chancie Senior Member How Do You Identify?: queer femme-inist Relationship Status: I'm lucky. Join Date: May 2010 Location: Western Mass Posts: 3,774 My Photo Gallery Thanks: 9,518 Thanked 14,541 Times in 2,744 Posts Rep Power: 21474855	The difference between the real coins and the fake coin is too subtle to tell with your hands. Your task is find a way to use the balance scale efficiently. ETA: Dreamer and I posted at the same time.

10-15-2010, 05:19 PM	#7
rlin Member How Do You Identify?: human Join Date: Mar 2010 Location: nomad Posts: 712 My Photo Gallery Thanks: 1,450 Thanked 1,189 Times in 451 Posts Rep Power: 1004849	i imagine that halving them til you get to the winner is the better idea... if the scale has to be used and they are identical i believe that would be the best bet... of course... i am sure that there must be something else that works better... because that just sounds too logical and easy...