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Find number abc

If caa3c - 5ab5a = 4b187 find number abc. Multiple solutions may exist.

Correct answers: 16

The first user who solved this task is Nasrin 24 T.

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New Yorkers and Light Bulbs

Q: How many New Yorkers does it take to screw in a light bulb?
A: One. What are you -- stupid?

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Rail detector car

In 1928, a rail detector car was demonstrated near Poughkeepsie, N.Y. to representatives of the American Railway Association and of various railroads. Invented by Dr. Elmer Ambrose Sperry, it was designed to enable locating internal flaws in existing railroad tracks. This first car, car No. 101, was capable of travelling at 10 mph while examining one rail at a time. It had been previously field-tested 13 Jun 1928.

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