BRAIN TEASERS

enter your answer and press button OK

What is the missing number?

Identify the pattern to find the missing number.

Correct answers: 146

The first user who solved this task is Djordje Timotijevic.

#brainteasers #math

Register with your Google Account and start collecting points.

Check your ranking on list.

People Are Ignoring Me

A patient walks into a doctor's office.
Patient: Doctor, people ignore me.
Doctor: Next!

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...

Charles Sumner Tainter

Born 25 Apr 1854; died 20 Apr 1940 at age 85.American inventor of various sound-recording instruments, including the photophone (1880, with Alexander Graham Bell), an instrument for transmitting sound to a distance through the agency of light, using sensitive selenium cells. He also developed the Graphophone (1881, patented 1886; with Chichester A. Bell, a cousin of Alexander Graham Bell). This greatly improved on the tinfoil surface and rigid stylus then used by Thomas Edison. Tainter devising a wax-coated cardboard cylinder and a flexible recording stylus which incised the grooves (rather than embossing) to achieve better reproduction, making the phonograph and the dictagraph commercially possible.

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.