Find number abc
[7262] Find number abc - If c5cba + c6084 = 5aba5 find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 11
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Find number abc

If c5cba + c6084 = 5aba5 find number abc. Multiple solutions may exist.
Correct answers: 11
#brainteasers #math
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Password Problem

A guy did system support in a law firm. One day, he had to

log a user off and then back on. He entered her initials and

then she gave me her password.

Her password was "genius".

After three tries and the system telling him "access

denied," he asked her how to spell it.

She said, "G - E - N - I - O - U - S."

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Ultrasonic alarm

In 1953, the first U.S. patent for a burglar alarm operated by ultrasonic sound was issued to Samuel Bagno of New York City (No. 2,655,645) on a system for movement detection in a confined space by intruders or fire. It was manufactured as the Alertronic and first sold in Jun 1950. A sound source produced waves of 19,000 hertz, a frequency too high for normal human hearing. An intruder could be detected by the alarm by a difference in frequency of the reflected waves from the moving body (the Doppler effect). The device would then sound an alarm.
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