Weighing The Gold Coins (Brain Teaser)


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!


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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