Calculate 1+3
[2385] Calculate 1+3 - If 3+4=19 and 5+6=41 then 1+3=? - #brainteasers #math #riddles - Correct Answers: 226 - The first user who solved this task is Roxana zavari
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Calculate 1+3

If 3+4=19 and 5+6=41 then 1+3=?
Correct answers: 226
The first user who solved this task is Roxana zavari.
#brainteasers #math #riddles
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Broke student

A college freshman called up his mother and asked her for some money, because he was broke. His mother said,

"Sure, sweetie. I will send you some money. You also left your

calculus book here when you visited 2 weeks ago.

Do you want me to send that up too?"

"Uhh, oh yeah, O.K." responded the student.

So his mom wrapped up the book and mailed it. Dad asked,

"Well how much did you give him?"

"Oh, I wrote 2 checks, one for $20, and the other for $500."

"That's $520!" said dad, "Are you crazy?"

"Don't worry honey," mom said. "I taped the $20 check to the

cover of his book, but I put the $500 one somewhere in ...

chapter 19!

Found on https://vk.com/notes15935520, posted by Liana Parhanita, on 4 Mar 2010

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Electric store lighting

In 1878, the first electric lighting in an American store was installed, using eight dynamos to run 28 Brush arc lamps* at John Wanamaker's extensive “Grand Depot” department store, Philadelphia, Pa. In 1875, he had bought the Pennsylvania Railroad depot for $500,000 and converted it into his innovative Grand Depot department store. The lamps had two sets of electrodes working alternately to lengthen the operating period. (patented by the maker, Charles F. Brush, on 2 Sep 1879, U.S. patent No. 219,208). The arc lamps gave a steadier light, but gas-lighting was retained as back-up. By 1888, Wanamaker had 355 arc lamps and 80 incandescent lamps*. He followed electric lights with ventilation fans. The electric displays drew customers.«
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