Calculate the number 7983
[7771] Calculate the number 7983 - NUMBERMANIA: Calculate the number 7983 using numbers [9, 1, 8, 3, 36, 867] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 1
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Calculate the number 7983

NUMBERMANIA: Calculate the number 7983 using numbers [9, 1, 8, 3, 36, 867] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
#brainteasers #math #numbermania
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A passenger in a taxi leaned o...

A passenger in a taxi leaned over to ask the driver a question and tapped him on the shoulder. The driver screamed, lost control of the cab, nearly hit a bus, drove up over the curb, and stopped just inches from a large plate glass window.

For a few moments everything was silent in the cab, and then the still shaking driver said, "I'm sorry but you scared the daylights out of me."

The frightened passenger apologized to the driver and said he didn't realize a mere tap on the shoulder could frighten him so much.

The driver replied, "No, no, I'm sorry, it's entirely my fault. Today is my first day driving a cab. I've been driving a hearse for the last 25 years."

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First computer virus

In 1983, U.S. student Fred Cohen presented to a security seminar the results of his test - the first documented virus, created as an experiment in computer security. Cohen created this first virus when studying for a PhD at the University of Southern California. Others had written about the potential for creating pernicious programs but he was the first to demonstrate a working example. In the paper, he defined a virus as "a program that can 'infect' other programs by modifying them to include a ... version of itself". Cohen added his virus to a graphics program called VD, written for a Vax mini-computer. The virus hid inside VD and used the permissions users had to look at other parts of the Vax computer to spread around the system.
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