Find number abc
[4566] Find number abc - If 70a97 - 11a14 = c90ba find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 50 - The first user who solved this task is Djordje Timotijevic
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Find number abc

If 70a97 - 11a14 = c90ba find number abc. Multiple solutions may exist.
Correct answers: 50
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math
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The dorm rules

On the first day of college, the Dean addressed the students, pointing out some of the rules:

"The female dormitory will be out-of-bounds for all male students, and the male dormitory to the female students. Anybody caught breaking this rule will be fined $20 the first time."

He continued, "Anybody caught breaking this rule the second time will be fined $60. Being caught a third time will cost you a fine of $180. Are there any questions?"

At this point, a male student in the crowd inquired: "How much for a season pass?"

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Pin making machine

In 1832, a pin manufacturing machine was patented by John Ireland Howe (U.S. No. 2013). During the 19th century the American pin industry concentrated in the Naugatuck River Valley because Howe (1793-1876) built a plant in Derby, Connecticut, to make pins with the machine he invented to shape pins in one operation instead of the 18 separate steps required for hand production. He turned for mechanical help to Robert Hoe (who built printing presses.) His first working model of a machine that would make pins, though imperfect, was exhibited that year at the American Institute Fair in New York, where Howe received a silver medal. He improved the machine during the winter of 1832-33. Howe also invented a machine to stick the pins in paper packets.
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