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Find number abc

If 7b5ba - c9906 = ab6a6 find number abc. Multiple solutions may exist.

Correct answers: 46

The first user who solved this task is Djordje Timotijevic.

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Chatting On The Plane

A man was recently flying to New York. He decided to strike up a conversation with his seat mate.
"I've got a great policeman joke. Would you like to hear it?"
"I should let you know first that I am a policeman."
"That's OK. I'll tell it really slow!"

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Deuterium

In 1933, Ernest Rutherford suggested the names diplogen for the newly discovered heavy hydrogen isotope and diplon for its nucleus. He presented these ideas in the Discussion on Heavy Hydrogen at the Royal Society. For ordinary hydrogen, the lightest of the atoms, having a nuclues of a sole proton, he coined a related name: haplogen. (Greek: haploos, single; diploos, double.) In 1931, Harold Urey had discovered small quantities of atoms of heavy hydrogen wherever ordinary hydrogen occurred. The mass of its nucleus was double that of ordinary hydrogen. This hydrogen-2 is now called deuterium, as named by Urey (Greek: deuteros, second). Its nucleus, named a deuteron, has a neutron in addition to a proton.[ref: Proc. Roy. Soc. A, vol. 144 (1934)]

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