Sandeep Krishna (Simons Centre for the Study of Living Machines, NCBS-TIFR, Bangalore

Contributed Articles

Pooling samples to increase SARS-CoV-2 testing

Pooling samples to increase SARS-CoV-2 testing

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You may have heard of this puzzle about identifying a fake coin: You have eight of Rs. 1 coins. Real coins weigh 10g each, but you are told that one of the coins is fake and weighs less than the others. Using a simple weighing machine, on which you can place some coins and read out their total weight, what is the least number of weighings in which you can locate the fake coin?