28 Apr '04 18:31>
I don't suppose I am right as it only took 2 mins
Originally posted by stevetoddI thought of that too, but unless that is part of the riddle, I decided that would make than one "weighing" as you are actualy weighing 10 times (worst case) to find the bag.
Think I have guessed it? You get on the cales with all bags, drop (dispose of a bag) and if the scale drops by an amount less than (is it 10 grams sorry forgot what the weight was) the weight of the real coins then the last bag dropped is the bag with fake coins. Is that the correct answer?
Steve
Originally posted by Faith No Morewell, then you would be knowing how much the fake coins weigh.
thats correct zaps! if for example the fake coins weigh 5 grams and the weight in the end is lets say 535 grams so you know that bag 3 is fake
shaul
Originally posted by jaredboudreauyou are right sorry about that. i dint tell this riddle in a long time so i forgot some details.
well, then you would be knowing how much the fake coins weigh.
so you must say the weight of the fake coins are known.
Other wise at 535 grams total you could think that bag 5 is fake, if the fake coins are 3 grams each.
or bag 6 is fake, if fake coins are 2.5g
;-) so we must have known how much the fake coins weigh to get the answer in one weighing.
Originally posted by Faith No MoreYou don't need to know exactly how much the fake coins weigh, but if you guarantee that they weigh less than 9 grams, then the trick becomes determining the optimal number of coins required from each bag to confidently determine which one is fake.
you are right sorry about that. i dint tell this riddle in a long time so i forgot some details.
shaul:
Originally posted by craigyOk folks, what is the minimum weighings if you had one pair of balance type scales, 10 bags of coins, and knew only that 1 bag contained fake coins which had a different (higher or lower) weight to the real coins?
You don't need to know exactly how much the fake coins weigh, but if you guarantee that they weigh less than 9 grams, then the trick becomes determining the optimal number of coins required from each bag to confidently determine which one is fake.
For example, if you took 1, 2, 3, 4, ... 10 coins from each bag respectively, and found the total to be two g ...[text shortened]... ant. You need a milliard (billion in American) coins in one of the bags for such an exercise. 😉
Originally posted by iamatigerAh, but this reduces to a problem we've had before. IIRC the answer is 3.
Ok folks, what is the minimum weighings if you had one pair of balance type scales, 10 bags of coins, and knew only that 1 bag contained fake coins which had a different (higher or lower) weight to the real coins?
I made this up just now and I'll be thinking up the answer at the same time as you lot - let's see who wins!
Originally posted by mortalmattIt's a little convoluted, but quite possible.
Prove it then Mr drunken Shogun... Tell us the answer!!!!!!!!😠😛