11 replies to this topic

[freakymama]

You have 27 coins, one is a little heavier then the others.
You have a balancing scale, so you can compare weight of two groups of coins.
You may weight 3 times to find out which coin is haevier than the others.
How can you do this?

Ok, I have 2 day's to come up with the answer. I must post my answer by tomorrow night!

Thank you for any help you may give me, as I am so bad at these.

[Gen]

First you need to put there, ok you'll get one with 13 and one with 14
See what got more weight but look one thing: If the side with 13 got more wight is that because the heavier coin is there.
Get it and separate again: One with 6 and one with 7. Now you'll see, if the one with 7 have to much more weight, is there, but if the 6 one have more or same the heavier one is there. Get and separate them again(the third and last time)
if is the 7 one do the same as you did with the others, one group with 4 and one with 3, if the one with 3 have more, get the tree coins and see what of it have more weight, you got it =)
If is the side with 4(if it got a lot more weight) do the same.
But if from those 7 the side who get more weight or the same is with three is easier than that, you go seeing what coin is heavier(by putting it on your hand) and than you'll got it =D
(I tried, im bad at riddles to XD)

[Hawk]

Divide into three groups of 9.

Weigh two of the groups, if they are the same use the unweighed, if not use the heavier group.

Divide that group into 3 groups of 3.

Weigh two of the groups, if they are the same use the unweighed group, if not use the heavier group.

Separate the three coins.

Weight two of them, if they are the same use the unweighed one, if not use the heaviest one.

[Stepoo]

Divide into three groups of 9.

Weigh two of the groups, if they are the same use the unweighed, if not use the heavier group.

Divide that group into 3 groups of 3.

Weigh two of the groups, if they are the same use the unweighed group, if not use the heavier group.

Separate the three coins.

Weight two of them, if they are the same use the unweighed one, if not use the heaviest one.

He hit the nail right on the head.

[Silk]

Divide into three groups of 9.

Weigh two of the groups, if they are the same use the unweighed, if not use the heavier group.

Divide that group into 3 groups of 3.

Weigh two of the groups, if they are the same use the unweighed group, if not use the heavier group.

Separate the three coins.

Weight two of them, if they are the same use the unweighed one, if not use the heaviest one.

You may weight 3 times to find out which coin is haevier than the others.

[Eeyore]

Zulfi hun he only did weigh three times. First time he weighed 9 coins on one side, 9 on the other and had 9 left out. Second weigh was 3 coins one scale, 3 coins the other and one left out, the third time was 1 coin on each side of the scale and one left out.

[Gen]

hawk is smart o.O
But couldn't be the way I did?
I mean, hawks way is more confiable, but I think my way is right to x.x

[Eeyore]

Well I think with riddles and things you have to be absolutely precise. With yours you have used your hands at the end to determine the heaviest, but surely you could just so that with all 27 and not use the scales at all? I think the idea is that by the end of the three weighs you'll know which coin to use, you don't then have to try and find out using your hands.

You did it far better then I would have managed though .

[Gen]

hhahaha, Im not good with riddles though, that riddles that hoju puted here...I stoped at 4th and can't go out, so I just quit XD
I really don't know how to solve riddles, but I tried XD Maybe I could just make a light go on your head and you get the right thinking XD

[Silk]

Zulfi hun he only did weigh three times. First time he weighed 9 coins on one side, 9 on the other and had 9 left out. Second weigh was 3 coins one scale, 3 coins the other and one left out, the third time was 1 coin on each side of the scale and one left out.

Gah, cheers for clearing that up. I got so confused. My bad, hawk. Now that I can actually see it clearly, that makes perfect sense.

*stabs hawk because he can actually do these things*

@ Michie :



*thinks about Generation's idea*
Dude, I think your way is flawed.
Think about it. If you get down to weighing groups of 6 and 7, you have no certain way of telling where the heavier coin is. If the coin is in the pile of 7, you're not going to know, as it should be heavier anyway. Hawks way works because he uses equal comparisons (sets of nine and three).
Well, that made sense in my own head anyway.

[freakymama]

Hawk and Generation and the lot of you who are helping me through these darn thing's. THANK YOU SO MUCH!
I cant do riddles for the life of me and would never know where to start, so thank you all so muck!
Hugg's~

[Hawk]

Hawk and Generation and the lot of you who are helping me through these darn thing's. THANK YOU SO MUCH!
I cant do riddles for the life of me and would never know where to start, so thank you all so muck!
Hugg's~

No problem xD I love riddles.