Can you replace the question mark with a number?
[6462] Can you replace the question mark with a number? - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 91 - The first user who solved this task is Fazil Hashim
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Can you replace the question mark with a number?

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 91
The first user who solved this task is Fazil Hashim.
#brainteasers #math #riddles
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A man and an ostrich walk into...

A man and an ostrich walk into a restaurant. The waitress asks, "What will it be?"
The man replied "a burger and a coke." "And you?" "I'll have the same," the ostrich replies. They finish their meal and pay. "That will be $4.50," The man reached into his pocket and pulled out the exact amount. They do this every day till Fri.
"The usual?" she asked. "No, today is Friday. I'll have steak and a coke."
"Me too." says the ostrich. They finish and pay. "That will be $10.95"
The man reached in and pulls out the exact amount again just like all week.
The waitress was dumb-founded. "How is it that you always have the exact amount?"
"Well," says the man. "I was cleaning my attic and I found a dusty lamp. I rubbed it and a genie appeared." Wow!" said the waitress. "What did you wish for?"
"I asked that when I needed to pay for something, the exact amount would appear in my pocket." "Amazing! Most people would ask for a million dollars. But what's with the ostrich?" "Well," said the man. "I also asked for a chick with long legs."
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First Audion tube

In 1906, the first triode was ordered by Lee de Forest who instructed the New York automobile lamp maker, H. W. Candless, to make a glass bulb containing a "grid" wire between a filament and an electrode plate. These specifications extended the Fleming two-element diode valve design previously published in the Proceedings of the Royal Society. The third element - the grid wire - regulated the flow of electrons between the filament and the anode plate, producing an amplification of the variations in a signal voltage applied to the grid. De Forest named his invention the "Audion." Within a few years (1913-1917) he was able to profit from his patents that he sold to AT&T for a total of $390,000.«[Image: A de Forest Audion tube, circa 1912.]
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