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Find number abc

If 91cba + a6403 = 11b9bc find number abc. Multiple solutions may exist.

Correct answers: 50

The first user who solved this task is Linda Tate Young.

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Kittens

A three-year-old went with his dad to see a litter of kittens. On returning home, he breathlessly informed his mother there were two boy kittens and two girl kittens.

"How did you know?" his mother asked.

"Daddy picked them up and looked underneath," he replied. "I think it was printed on the bottom."

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Musical Arcs

In 1900, Nature reported the Musical Arcs invented by William Du Bois Duddell, an English physicist. By means of an arrangement of electric currents he produced a musical note from an arc lamp that could be altered to any pitch is obtained and a tune played. This may be regarded as the first fully electric instrument. While investigating the noise produced by the operation of carbon arc lamps - anything from a low hum to a high-pitched whistle - he found that adding resonance circuits adjusted the pitch of the sounds. His Singing Arc demonstrated this phenomenon using a keyboard connected to an arc lamp, giving audible results without any amplifier. He toured the country with his Singing Arc, as a novelty performance.«*

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