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What is the missing number?

Correct answers: 160

The first user who solved this task is Fazil Hashim.

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When someone truly cares

When someone truly cares about you they make an effort not an excuse.

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Julian W. Hill

Died 28 Jan 1996 at age 91 (born 4 Sep 1904).Julian Werner Hill was an American chemist was a U.S. research chemist who discovered cold drawing, a technique of strengthening polymer fibers by stretching. Julian Hill and Wallace Carothers had been building long polymer chains by a reaction of a carboxylic acid with an alcohol to give an ester in a device called a molecular still. While removing a sample of the resultant product from the still, Hill observed that the molten polymer could be drawn into fibers. He then made an important and unexpected discovery - that after being cooled, these pliable filaments could be stretched or "cold drawn" to form very strong fibers. Further tests on the sample showed that it had a molecular weight of over 12,000, far higher than any previous polymer.

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