Replace the question mark with a number
[4121] Replace the question mark with a number - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 132 - The first user who solved this task is H Tav
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: 132
The first user who solved this task is H Tav.
#brainteasers #math #riddles
Register with your Google Account and start collecting points.
Check your ranking on list.

An older man, not in the best...

An older man, not in the best physical condition, asked the trainer in the gym, "I want to impress that beautiful girl. Which machine should I use?"
The trainer replied...
"Use the ATM machine outside the gym!"
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...

First electron tube

In 1904, the first electron tube, a diode thermionic valve, was invented by John Ambrose Fleming. The valve consists of a carbon or tungsten filament lamp, to which is added a metal plate (insulated from the filament), and a connecting wire brought through the glass wall of the bulb to a third terminal outside. When battery current is applied to the filament making it incandescent, the space between the filament and the insulated plate will be found to conduct elecrons in only one direction. That means if the valve is connected in a circuit in with an oscillating current, its one-way conductivity will convert the oscillating current into a unidirectional current capable of actuating a telephone receiver. He notified Marconi in a 30 Nov 1904 letter.
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.