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Find number abc

If 3c1a8 + 81b0a = 1b0385 find number abc. Multiple solutions may exist.

Correct answers: 11

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A guy's on the electric chair

A guy's on the electric chair. The warden's just about to pull the switch when the guy gets the hiccups.
The warden says, "Do you have any last requests?"
The guy says, "(hic) Yeah... (hic) could you please do (hic)... could you please do something to scare me?"

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Annunciator

In 1833, the first U.S. patent for an annunciator was issued to Seth Fuller of Boston, Mass. In 1829, this design was installed in the Tremont House, Boston, Mass., and placed in service when the 170-room hotel opened. It was known as "hanging bells" for its 140 bells, each in a glass-enclosed box, mounted in a space 57 ft long, 6 ft high and 1 ft deep. A small hammer striker provided an audible warning sound and vibrated a card giving the room number. The hotel's innovations included the installation of eight bathrooms and toilets in the basement. Each of two cisterns in the hotel attic contained three hogsheads of rainwater. One supplied the baths, and the other supplied other outlets, including running cold water in the laundry and kitchen.

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