Replace the question mark with a number
[4069] Replace the question mark with a number - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 129 - The first user who solved this task is Thinh Ddh
BRAIN TEASERS
enter your answer and press button OK

Replace the question mark with a number

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 129
The first user who solved this task is Thinh Ddh.
#brainteasers #math #riddles
Register with your Google Account and start collecting points.
Check your ranking on list.

Send my luggage

Passenger to Airline Ticket Agent: I want my brown suitcase sent to Los Angeles, my green suitcase sent to Kansas City, and my tan suitcase sent to New Orleans.

Ticket Agent: I'm sorry, sir; this flight is to Nashville. We can't do that.

Passenger: Why not ? You did it last time.

Jokes of the day - Daily updated jokes. New jokes every day.
Follow Brain Teasers on social networks

Brain Teasers

puzzles, riddles, mathematical problems, mastermind, cinemania...

Vacuum tube

In 1906, Dr. Lee DeForest (26 Aug 1873 - 30 Jun 1961), one of the “fathers of radio,'' announced his three-element electrical vacuum tube (now known as a triode) to a meeting of the American Institute of Electrical Engineers He had discovered that when a mesh, or grid, of wire was placed between the filament and collector “plate” in a diode tube (first made by J. Ambrose Fleming, 1904), a large voltage-amplifying effect could be produced. DeForest patented this vacuum tube on 15 Jan 1907. The ability of this tube to amplifiy weak signals was an invention as great as radio itself, because it made long-distance communication possible.[Image: early DeForest Audion]
This site uses cookies to store information on your computer. Some are essential to help the site properly. Others give us insight into how the site is used and help us to optimize the user experience. See our privacy policy.