PALINDROME (1446908782)
[1667] PALINDROME (1446908782) - Make the palindrome of the following letters: A, A, A, D, D, N, N, O, O, O, O, R, R, S, S, T, T, T, T, T, T - #brainteasers #wordpuzzles #palindrome - Correct Answers: 42 - The first user who solved this task is Sanja Šabović
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PALINDROME (1446908782)

Make the palindrome of the following letters: A, A, A, D, D, N, N, O, O, O, O, R, R, S, S, T, T, T, T, T, T
Correct answers: 42
The first user who solved this task is Sanja Šabović.
#brainteasers #wordpuzzles #palindrome
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Little voices

A guy goes into a bar and orders a beer. As he takes a sip of his beer, he hears a tiny little voice say: "Nice tie." He looks around but sees no one. He take another sip of his beer and hears: "A nice shirt, too." Again he looks around and sees no one.

He signals the bartender over, and hesitantly explains that he's hearing voices talking to him... "Of course," smiles the bartender. "It's the peanuts -- they're complimentary."

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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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