Puzzle 2 - 10 bags each have 10 coins each coin weighs 1 gm but in 1 bag only all coins weigh 0.9 gm. You can use the weighing machine only once how to find the bag with 0.9 gm coins?

Anonymous
1y

We will take 1 coin from 1st bag, 2 coins from 2nd bag, and so on, and sum up them as 1+2+3+4.....+10. It should be 55.

If the coins are of 0.9 gms the consecutive weight will be decreased in total.

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