Mathematics, 26.07.2019 08:00, yesharabaskoro

# You have 12 coins, one of which is fake. the fake coin is indistinguishable from the rest except that it is heavier. can you determine which is the real coin heavier using a balance scale and only 3 weighings?

Answers: 1

Mathematics, 17.07.2019 18:30, gomezjuana123

1. (8 points) if there are 81 gold coins with one of them a fake lighter coin, describe a non- adaptive solution that will find the fake coin using 4 weighings of a pan balance. (hint: how many four letter words can be made using only the letters a, b and c? use these words to label the coins

Answers: 1

Engineering, 15.10.2019 22:00, only1cache

Astack of fake coins there are n stacks of n identical-looking coins. all ofthe coins in one of these stacks are counterfeit, while all the coins in the otherstacks are genuine. every genuine coin weighs 10 grams; every fake weighs11 grams. you have an analytical scale that can determine the exact weight ofany number of coins. a. devise a brute-force algorithm to identify the stack with the fake coins anddetermine its worst-case efficiency class. b. what is the minimum number of weighings needed to identify the stackwith the fake coins?

Answers: 2

Engineering, 31.10.2019 02:31, kobiemajak

Advanced fake-coin problem there are n ≥ 3 coins identical in appearance; either all are genuine or exactly one of them is fake. it is unknown whether the fake coin is lighter or heavier than the genuine one. you have a balance scale with which you can compare any two sets of coins. that is, by tipping to the left, to the right, or staying even, the balance scale will tell whether the sets weigh the same or which of the sets is heavier than the other, but not by how much. the problem is to find whether all the coins are genuine and, if not, to find the fake coin and establish whether it is lighter or heavier than the genuine ones.

Answers: 2

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