Calculate A*B-C-D
[6373] Calculate A*B-C-D - Look at the series (7, 4, 5, 12, 45, D, 1329, 9300, 74397, C, B, A, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A*B-C-D! - #brainteasers #math - Correct Answers: 19 - The first user who solved this task is Nílton Corrêa de Sousa
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Calculate A*B-C-D

Look at the series (7, 4, 5, 12, 45, D, 1329, 9300, 74397, C, B, A, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A*B-C-D!
Correct answers: 19
The first user who solved this task is Nílton Corrêa de Sousa.
#brainteasers #math
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Kia vs Rolls-Royce

A man driving a Kia stops at a traffic light next to a Rolls-Royce.

The Kia driver rolls down his window and calls out to the Rolls-Royce driver, "Hey, pal, that's an impressive car. Does your Rolls have Wi-Fi? My Kia does!"
The Rolls-Royce driver replies, "Yes, it has Wi-Fi."

The Kia driver continues, "Nice! And do you have a fridge in there? I have a fridge in the backseat of my Kia!"
The Rolls-Royce driver, getting irritated, responds, "Yes, there's a refrigerator."

Not backing down, the Kia driver asks, "That's cool, man! What about a TV? I've got a TV in my Kia's backseat!"
The Rolls-Royce driver, increasingly annoyed, says, "Yes, there's a television. A Rolls-Royce is the epitome of luxury vehicles!"

The Kia driver says, "Amazing car! But, do you have a bed in there? I've got a bed in the back of my Kia!"
Frustrated that his car lacks a bed, the Rolls-Royce driver speeds off. He heads straight to the dealership and orders a bed to be installed in his Rolls. The following morning, he picks up his car, and the bed looks fantastic, complete with silk sheets and elegant brass accents. It's undoubtedly a bed suited for a Rolls-Royce.

The Rolls-Royce driver spends the entire day searching for the Kia. Finally, late that night, he spots the Kia parked with fogged-up windows. He gets out of his Rolls-Royce and knocks on the Kia's window. At first, there's no response, but then the owner pokes his head out, dripping wet.

"I now have a bed in the back of my Rolls-Royce," the Rolls-Royce driver declares smugly.
The Kia driver replies, "Did you really drag me out of the shower just to tell me that?!"

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Dried blood serum

In 1933, dried human blood serum was prepared for the first time in the U.S. at the school of Medicine, University of Pennsylvania, Philadelphia, Pa. It was prepared by Drs. Earl W. Flosdorf, an experienced refrigeration engineer, and Stuart Mudd who created a glass apparatus to freeze-dry serum, the clear fluid in the blood that contains the proteins and antibodies formed by the body's immune system to protect against infection. The powdered, dried blood serum was used successfully for transfusions for the prevention of childhood diseases. The method was first described in April of the following year at a meeting of the American Chemical Society at St. Petersburg, Florida. Dried blood serum was used during WW II.[Image: detail from a photograph taken at an exhibit of the equipment. Shell-freezing unit far left, vacuum pump next to it, and next to it refrigeration trap to remove moisture from drying plasma. Metal cylinder in foreground serves as a drying chamber.]
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