There are some diamonds in a jar in a house. There are seven thieves who saw those diamonds and planned to steal them at one night. Each of those thieves came one by one at one night with out having the knowledge of other thieves. Each thief entered the house and took half of the diamonds from the jar. But each thief is kind enough to put back one diamond into the jar. In the morning when the house owner opened the jar he saw 2 diamonds in it. How many diamonds were there in that jar initially before the first thief came?
As each thief takes half of the diamonds, and puts one back.
Which leaves with 2 diamonds after every thief.
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