# contest R2 Q10

10 bag contains 10 gold coins each. each coin weights 10 grams. however there is one bag with defective coins where each coin weighs 9 grams . how many minimum times weighing has to be done in order to find the bag with defective coins?

Forward This Problem to Friend http://www.solvemaths.in/contest-3/AptitudeArithmetic10 bag contains 10 gold coins each. each coin weights 10 grams. however there is one bag with defective coins where each coin weighs 9 grams . how many minimum times weighing has to be done in order to find the bag with defective coins?

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One trial

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If coins are allowed to be weighed individually (not necessarily all 10 from a bag at once), only one weighing is sufficient

one (1) time only

only once.

take 1 from first bag 2 from second and so on. by knowing difference in weights we can easily find the defective bag.

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