Calculate the number 1564
[2364] Calculate the number 1564 - NUMBERMANIA: Calculate the number 1564 using numbers [8, 4, 5, 1, 91, 717] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 28 - The first user who solved this task is Erkain Mahajanian
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Calculate the number 1564

NUMBERMANIA: Calculate the number 1564 using numbers [8, 4, 5, 1, 91, 717] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 28
The first user who solved this task is Erkain Mahajanian.
#brainteasers #math #numbermania
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Stolen Car

A drunk phoned the police to report that thieves had broken in to his car.
"They've stolen the dashboard, steering wheel, break pedal, even the accelerator," he cried out.
However, before the police investigation could get under way the phone rang a second time, with the same voice came over the line. "Never mind," said the drunk with a hiccup, "I got in the backseat by mistake."

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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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