Weighing The Gold Coins (Brain Teaser)

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You have 10 bags with 10 gold coins each. Nine bags have genuine coins that weigh 10g each, but one bag has fake coins that are only 9g each. Using a digital scale and only one weighing, how do you figure out which bag has the fake coins?

Post your answers in comments below!

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2 comments on “Weighing The Gold Coins (Brain Teaser)

  1. qwwdfsad says:

    10 coins from first bag, 9 coins from second bag, … 1 coin from last bag. Then difference between 10 * 11 / 2 and weight from scale will be answer, right?

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