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Find number abc

If 7a7bb - 7aab8 = bc7 find number abc. Multiple solutions may exist.

Correct answers: 42

The first user who solved this task is Djordje Timotijevic.

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What are you doing this evening?

Rebecca, the curvy blonde secretary, came out from the cabin of her boss. She was shaking with anger, so a colleague asked her what was wrong.

Rebecca said,"The Boss asked me what was I doing this evening."

The colleague asked, "So what did you say?"

Rebecca answered, "I said I was doing nothing. He gave me 50 pages to type!"

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Zygmunt Florenty von Wroblewski

Died 19 Apr 1888 at age 42 (born 28 Oct 1845).Polish physicist who liquefied the “permanent gases” such as nitrogen and carbon monoxide in larger quantities than previously accomplished by Cailletet, whose method he improved. In 1883, he achieved the static liquefaction of oxygen and air. He was the first to liquify hydrogen. Although he achieved it only in a transient fine mist, he published (1885) remarkably accurate data: critical temperature 33 K, critical pressure, 13.3 atm and boiling point, 23 K (modern values 33.3 K, 12.8 atm, 20.3 K). He may also have had a hint of strange electrical properties at very low temperatures, but his research was cut short upon his accidental death. Wroblewski died as a result of burns in a fire started when he overturned a kerosene lamp in his laboratory.*

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