Fishy Weather Conditions By Phillip Cho Need some answers

Mathematics

1 answer:

Nataly_w [17]1 year ago

8 0

Answer:

SBAC Practice Test Grade 6 Part 1 Fishy Weather Conditions By Phillip Cho Lajamanu, Australia, is a dry little town with 600 residents

Step-by-step explanation:

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Step-by-step explanation:

You can split the coins into 3 groups, each of them has 3 coins. Weigh group 1 vs group 2, if one is lighter, that group has the fake coin. If both groups weigh the same, then group 3 has the fake coin.

Continue to split the group that has the fake coin into 3 groups, each group has 1 coin. Now apply the same procedure and we can identify the fake coin.

Total of scale usage is 2

b) if you have $3^n$ coins then you can apply the same approach and find the fake coin with just n steps. By splitting up to 3 groups each step, after each step you should be able to narrow down your suspected coin by 3 times.