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Find number abc

If ccb0c - 5babc = 11cc0 find number abc. Multiple solutions may exist.

Correct answers: 37

The first user who solved this task is Djordje Timotijevic.

#brainteasers #math

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Paper shredder...

The new employee stood before the paper shredder looking confused.

"Need some help?" a secretary asked.

"Yes," he replied. "How does this thing work?"

"Simple," she said, taking the fat report from his hand and feeding it into the shredder.

"Thanks, but where do the copies come out?"

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DuPrene

In 1931, The DuPont company, of Wilmington, Delaware, announced the first synthetic rubber. It was known as DuPrene, and from 1936 as Neoprene. Many scientists were trying to make natural rubber in the 1920s and 30s. One of the Wallace Carothers team, Gerard Berchet, had left a sample of monovinylacetylene in a jar with hydrochloric acid (HCl) for about five weeks. Then on 17 Apr 1930, coworker Arnold M. Collins happened to look in that jar and found a rubbery white material. The HCl had reacted with the vinylacetylene, making chloroprene, which then polymerized to become polychloroprene. The new rubber was expensive, but resisted oil and gasoline, which natural rubber didn't. It was the first good synthetic rubber.[Image: Wallace Carothers showing the new DuPrene product]

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